Added Shell samples

2019-06-03 20:59:16 +02:00 · 2019-06-03 20:59:16 +02:00 · 9a1492bfb3
--- a/README.md
+++ b/README.md
@ -49,6 +49,7 @@ The CollectionView is a flexible and performant view for presenting lists of dat
 In addition to allowing different layouts, the CollectionView has better performance than the ListView, but... how much does it improve the performance?.

 ![CollectionView](images/collectionviewperf.png)
+![CollectionView Create Renderer](images/collectionviewperf-createrenderer.png)

 ### Fast Renderers

--- a/Shell/NoShellPerformance.sln
+++ b/Shell/NoShellPerformance.sln
@ -0,0 +1,83 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.28917.182
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NoShellPerformance.Android", "NoShellPerformance\NoShellPerformance.Android\NoShellPerformance.Android.csproj", "{08F2E514-33F1-47FA-BF28-756EB13856F2}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NoShellPerformance.iOS", "NoShellPerformance\NoShellPerformance.iOS\NoShellPerformance.iOS.csproj", "{71F206F6-33B4-4FEA-8FEC-577B723A1DBB}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NoShellPerformance", "NoShellPerformance\NoShellPerformance\NoShellPerformance.csproj", "{1646EFFA-2DEF-4ED7-97E5-A0F19CC64A7B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|iPhone = Debug|iPhone
+		Debug|iPhoneSimulator = Debug|iPhoneSimulator
+		Release|Any CPU = Release|Any CPU
+		Release|iPhone = Release|iPhone
+		Release|iPhoneSimulator = Release|iPhoneSimulator
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{08F2E514-33F1-47FA-BF28-756EB13856F2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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+		{71F206F6-33B4-4FEA-8FEC-577B723A1DBB}.Debug|iPhone.Build.0 = Debug|iPhone
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+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {8EFABB83-53C9-4481-9E23-4822548EAF09}
+	EndGlobalSection
+EndGlobal
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Assets/AboutAssets.txt
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Assets/AboutAssets.txt
@ -0,0 +1,19 @@
+Any raw assets you want to be deployed with your application can be placed in
+this directory (and child directories) and given a Build Action of "AndroidAsset".
+
+These files will be deployed with you package and will be accessible using Android's
+AssetManager, like this:
+
+public class ReadAsset : Activity
+{
+    protected override void OnCreate (Bundle bundle)
+    {
+        base.OnCreate (bundle);
+
+        InputStream input = Assets.Open ("my_asset.txt");
+    }
+}
+
+Additionally, some Android functions will automatically load asset files:
+
+Typeface tf = Typeface.CreateFromAsset (Context.Assets, "fonts/samplefont.ttf");
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Helpers/ProfilerTimeHelper.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Helpers/ProfilerTimeHelper.cs
@ -0,0 +1,67 @@
+using Java.IO;
+using Java.Lang;
+using System;
+using System.Globalization;
+
+namespace NoShellPerformance.Droid.Helpers
+{
+    // Based on: https://github.com/toomasz/XamarinAppStartupTime
+    // By Tomasz Ścisłowicz
+    public class ProfilerTimeHelper
+    {
+        const string LogcatTimeFormat = "yyyy-MM-dd HH:mm:ss.fff";
+
+        private static DateTime? StartupTime;
+        private static bool _attemptedToGetStartupTime;
+
+        public static DateTime? GetAppStartupTime()
+        {
+            if (_attemptedToGetStartupTime)
+            {
+                return StartupTime;
+            }
+            if (!StartupTime.HasValue)
+            {
+                StartupTime = GetStartupTimeFromLogcat();
+                _attemptedToGetStartupTime = true;
+            }
+            return StartupTime;
+        }
+
+        private static DateTime? GetStartupTimeFromLogcat()
+        {
+            var pid = Android.OS.Process.MyPid();
+
+            var process = new ProcessBuilder().
+                RedirectErrorStream(true).
+                Command("/system/bin/logcat", $"--pid={pid}", "-m", "1", "-v", "year").Start();
+
+            using (var bufferedReader = new BufferedReader(new InputStreamReader(process.InputStream)))
+            {
+                string line = null;
+                while ((line = bufferedReader.ReadLine()) != null)
+                {
+                    if (ParseLogDateTime(line, out DateTime date))
+                    {
+                        return date;
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        private static bool ParseLogDateTime(string logLine, out DateTime dateTime)
+        {
+            if (logLine.Length < LogcatTimeFormat.Length)
+            {
+                dateTime = new DateTime();
+                return false;
+            }
+            var timeStr = logLine.Substring(0, LogcatTimeFormat.Length);
+
+            return DateTime.TryParseExact(timeStr, LogcatTimeFormat,
+                CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal, out dateTime);
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/MainActivity.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/MainActivity.cs
@ -0,0 +1,37 @@
+using Android.App;
+using Android.Content.PM;
+using Android.Runtime;
+using Android.OS;
+using NoShellPerformance.Droid.Services;
+using Xamarin.Forms;
+
+namespace NoShellPerformance.Droid
+{
+    [Activity(
+        Label = "NoShellPerformance", 
+        Icon = "@mipmap/icon", 
+        Theme = "@style/MainTheme", 
+        MainLauncher = true, 
+        ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
+    public class MainActivity : Xamarin.Forms.Platform.Android.FormsAppCompatActivity
+    {
+        protected override void OnCreate(Bundle savedInstanceState)
+        {
+            TabLayoutResource = Resource.Layout.Tabbar;
+            ToolbarResource = Resource.Layout.Toolbar;
+
+            base.OnCreate(savedInstanceState);
+
+            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
+            Forms.Init(this, savedInstanceState);
+            DependencyService.Register<ProfilerService>();
+            LoadApplication(new App());
+        }
+        public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
+        {
+            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
+
+            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/NoShellPerformance.Android.csproj
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/NoShellPerformance.Android.csproj
@ -0,0 +1,115 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{08F2E514-33F1-47FA-BF28-756EB13856F2}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <TemplateGuid>{6968b3a4-1835-46a3-ac5c-1ae33b475983}</TemplateGuid>
+    <OutputType>Library</OutputType>
+    <RootNamespace>NoShellPerformance.Droid</RootNamespace>
+    <AssemblyName>NoShellPerformance.Android</AssemblyName>
+    <AndroidApplication>True</AndroidApplication>
+    <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
+    <AndroidResgenClass>Resource</AndroidResgenClass>
+    <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
+    <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
+    <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
+    <AndroidUseLatestPlatformSdk>false</AndroidUseLatestPlatformSdk>
+    <TargetFrameworkVersion>v9.0</TargetFrameworkVersion>
+    <AndroidEnableSGenConcurrent>true</AndroidEnableSGenConcurrent>
+    <AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidLinkMode>None</AndroidLinkMode>
+    <AotAssemblies>true</AotAssemblies>
+    <EnableLLVM>false</EnableLLVM>
+    <AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidManagedSymbols>true</AndroidManagedSymbols>
+    <AndroidUseSharedRuntime>false</AndroidUseSharedRuntime>
+    <AotAssemblies>true</AotAssemblies>
+    <EnableLLVM>true</EnableLLVM>
+    <AndroidEnableProfiledAot>true</AndroidEnableProfiledAot>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Mono.Android" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="3.6.0.344457" />
+    <PackageReference Include="Xamarin.Android.Support.Design" Version="28.0.0.1" />
+    <PackageReference Include="Xamarin.Android.Support.v7.AppCompat" Version="28.0.0.1" />
+    <PackageReference Include="Xamarin.Android.Support.v4" Version="28.0.0.1" />
+    <PackageReference Include="Xamarin.Android.Support.v7.CardView" Version="28.0.0.1" />
+    <PackageReference Include="Xamarin.Android.Support.v7.MediaRouter" Version="28.0.0.1" />
+    <PackageReference Include="Xamarin.Android.Support.Core.Utils" Version="28.0.0.1" />
+    <PackageReference Include="Xamarin.Android.Support.CustomTabs" Version="28.0.0.1" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.1.0" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Helpers\ProfilerTimeHelper.cs" />
+    <Compile Include="MainActivity.cs" />
+    <Compile Include="Resources\Resource.designer.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Services\ProfilerService.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\AboutResources.txt" />
+    <None Include="Assets\AboutAssets.txt" />
+    <None Include="Properties\AndroidManifest.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\layout\Tabbar.axml" />
+    <AndroidResource Include="Resources\layout\Toolbar.axml" />
+    <AndroidResource Include="Resources\values\styles.xml" />
+    <AndroidResource Include="Resources\values\colors.xml" />
+    <AndroidResource Include="Resources\mipmap-anydpi-v26\icon.xml" />
+    <AndroidResource Include="Resources\mipmap-anydpi-v26\icon_round.xml" />
+    <AndroidResource Include="Resources\mipmap-hdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-hdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-mdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-mdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xhdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xxhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xxhdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xxxhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xxxhdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\drawable\xamarin_logo.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Resources\drawable-hdpi\" />
+    <Folder Include="Resources\drawable-xhdpi\" />
+    <Folder Include="Resources\drawable-xxhdpi\" />
+    <Folder Include="Resources\drawable-xxxhdpi\" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\NoShellPerformance\NoShellPerformance.csproj">
+      <Project>{8A7F400C-2ED8-463D-A378-1EE41AD4E845}</Project>
+      <Name>NoShellPerformance</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
+</Project>
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Properties/AndroidManifest.xml
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Properties/AndroidManifest.xml
@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.NoShellPerformance">
+    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
+    <application android:label="NoShellPerformance.Android"></application>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+</manifest>
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Properties/AssemblyInfo.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Properties/AssemblyInfo.cs
@ -0,0 +1,34 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using Android.App;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("NoShellPerformance.Android")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("NoShellPerformance.Android")]
+[assembly: AssemblyCopyright("Copyright ©  2014")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: ComVisible(false)]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+
+// Add some common permissions, these can be removed if not needed
+[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
+[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/AboutResources.txt
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/AboutResources.txt
@ -0,0 +1,50 @@
+Images, layout descriptions, binary blobs and string dictionaries can be included 
+in your application as resource files.  Various Android APIs are designed to 
+operate on the resource IDs instead of dealing with images, strings or binary blobs 
+directly.
+
+For example, a sample Android app that contains a user interface layout (main.xml),
+an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png) 
+would keep its resources in the "Resources" directory of the application:
+
+Resources/
+    drawable-hdpi/
+        icon.png
+
+    drawable-ldpi/
+        icon.png
+
+    drawable-mdpi/
+        icon.png
+
+    layout/
+        main.xml
+
+    values/
+        strings.xml
+
+In order to get the build system to recognize Android resources, set the build action to
+"AndroidResource".  The native Android APIs do not operate directly with filenames, but 
+instead operate on resource IDs.  When you compile an Android application that uses resources, 
+the build system will package the resources for distribution and generate a class called
+"Resource" that contains the tokens for each one of the resources included. For example, 
+for the above Resources layout, this is what the Resource class would expose:
+
+public class Resource {
+    public class drawable {
+        public const int icon = 0x123;
+    }
+
+    public class layout {
+        public const int main = 0x456;
+    }
+
+    public class strings {
+        public const int first_string = 0xabc;
+        public const int second_string = 0xbcd;
+    }
+}
+
+You would then use R.drawable.icon to reference the drawable/icon.png file, or Resource.layout.main 
+to reference the layout/main.xml file, or Resource.strings.first_string to reference the first 
+string in the dictionary file values/strings.xml.
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/Resource.designer.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/Resource.designer.cs
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/drawable/xamarin_logo.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/drawable/xamarin_logo.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/layout/Tabbar.axml
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/layout/Tabbar.axml
@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.TabLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/sliding_tabs"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    app:tabIndicatorColor="@android:color/white"
+    app:tabGravity="fill"
+    app:tabMode="fixed" />
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/layout/Toolbar.axml
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/layout/Toolbar.axml
@ -0,0 +1,9 @@
+<android.support.v7.widget.Toolbar
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/toolbar"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    android:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
+
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-anydpi-v26/icon.xml
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-anydpi-v26/icon.xml
@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/launcher_background" />
+    <foreground android:drawable="@mipmap/launcher_foreground" />
+</adaptive-icon>
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-anydpi-v26/icon_round.xml
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-anydpi-v26/icon_round.xml
@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/launcher_background" />
+    <foreground android:drawable="@mipmap/launcher_foreground" />
+</adaptive-icon>
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-hdpi/icon.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-hdpi/icon.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-hdpi/launcher_foreground.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-hdpi/launcher_foreground.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-mdpi/icon.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-mdpi/icon.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-mdpi/launcher_foreground.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-mdpi/launcher_foreground.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xhdpi/icon.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xhdpi/icon.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xhdpi/launcher_foreground.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xhdpi/launcher_foreground.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xxhdpi/icon.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xxhdpi/icon.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xxhdpi/launcher_foreground.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xxhdpi/launcher_foreground.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xxxhdpi/icon.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xxxhdpi/icon.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xxxhdpi/launcher_foreground.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/mipmap-xxxhdpi/launcher_foreground.png
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/values/colors.xml
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/values/colors.xml
@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="launcher_background">#FFFFFF</color>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/values/styles.xml
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Resources/values/styles.xml
@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<resources>
+
+  <style name="MainTheme" parent="MainTheme.Base">
+  </style>
+  <!-- Base theme applied no matter what API -->
+  <style name="MainTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
+    <!--If you are using revision 22.1 please use just windowNoTitle. Without android:-->
+    <item name="windowNoTitle">true</item>
+    <!--We will be using the toolbar so no need to show ActionBar-->
+    <item name="windowActionBar">false</item>
+    <!-- Set theme colors from http://www.google.com/design/spec/style/color.html#color-color-palette -->
+    <!-- colorPrimary is used for the default action bar background -->
+    <item name="colorPrimary">#2196F3</item>
+    <!-- colorPrimaryDark is used for the status bar -->
+    <item name="colorPrimaryDark">#1976D2</item>
+    <!-- colorAccent is used as the default value for colorControlActivated
+         which is used to tint widgets -->
+    <item name="colorAccent">#FF4081</item>
+    <!-- You can also set colorControlNormal, colorControlActivated
+         colorControlHighlight and colorSwitchThumbNormal. -->
+    <item name="windowActionModeOverlay">true</item>
+
+    <item name="android:datePickerDialogTheme">@style/AppCompatDialogStyle</item>
+  </style>
+
+  <style name="AppCompatDialogStyle" parent="Theme.AppCompat.Light.Dialog">
+    <item name="colorAccent">#FF4081</item>
+  </style>
+</resources>
--- a/Shell/NoShellPerformance/NoShellPerformance.Android/Services/ProfilerService.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.Android/Services/ProfilerService.cs
@ -0,0 +1,48 @@
+using NoShellPerformance.Droid.Helpers;
+using NoShellPerformance.Services;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace NoShellPerformance.Droid.Services
+{
+    public class ProfilerService : IProfilerService
+    {
+        private static Dictionary<string, DateTime?> _eventTimingsSinceStartup = new Dictionary<string, DateTime?>();
+
+        public static void RegisterInternalEvent(string eventName)
+        {
+            if (_eventTimingsSinceStartup.ContainsKey(eventName))
+            {
+                return;
+            }
+
+            _eventTimingsSinceStartup.Add(eventName, DateTime.Now);
+        }
+
+        public void RegisterEvent(string eventName)
+        {
+            RegisterInternalEvent(eventName);
+        }
+
+        public async Task<Dictionary<string, TimeSpan?>> GetTimingsSinceStartup()
+        {
+            return await Task.Factory.StartNew(() =>
+            {
+                var timings = new Dictionary<string, TimeSpan?>();
+                var startupTime = ProfilerTimeHelper.GetAppStartupTime();
+
+                foreach (var eventInfo in _eventTimingsSinceStartup)
+                {
+                    timings.Add(eventInfo.Key, eventInfo.Value - startupTime);
+                }
+                return timings;
+            });
+        }
+
+        public DateTime? GetStartupTime()
+        {
+            return ProfilerTimeHelper.GetAppStartupTime();
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/AppDelegate.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/AppDelegate.cs
@ -0,0 +1,30 @@
+using Foundation;
+using NoShellPerformance.iOS.Services;
+using UIKit;
+using Xamarin.Forms;
+
+namespace NoShellPerformance.iOS
+{
+    // The UIApplicationDelegate for the application. This class is responsible for launching the 
+    // User Interface of the application, as well as listening (and optionally responding) to 
+    // application events from iOS.
+    [Register("AppDelegate")]
+    public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
+    {
+        //
+        // This method is invoked when the application has loaded and is ready to run. In this 
+        // method you should instantiate the window, load the UI into it and then make the window
+        // visible.
+        //
+        // You have 17 seconds to return from this method, or iOS will terminate your application.
+        //
+        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
+        {
+            global::Xamarin.Forms.Forms.Init();
+            DependencyService.Register<ProfilerService>();
+            LoadApplication(new App());
+
+            return base.FinishedLaunching(app, options);
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Contents.json
@ -0,0 +1,117 @@
+{
+  "images": [
+    {
+      "scale": "2x",
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "3x",
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "Icon60.png"
+    },
+    {
+      "scale": "2x",
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon58.png"
+    },
+    {
+      "scale": "3x",
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon87.png"
+    },
+    {
+      "scale": "2x",
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "Icon80.png"
+    },
+    {
+      "scale": "3x",
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "Icon120.png"
+    },
+    {
+      "scale": "2x",
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "Icon120.png"
+    },
+    {
+      "scale": "3x",
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "Icon180.png"
+    },
+    {
+      "scale": "1x",
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "Icon20.png"
+    },
+    {
+      "scale": "2x",
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "1x",
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "Icon29.png"
+    },
+    {
+      "scale": "2x",
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "Icon58.png"
+    },
+    {
+      "scale": "1x",
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "2x",
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "Icon80.png"
+    },
+    {
+      "scale": "1x",
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "Icon76.png"
+    },
+    {
+      "scale": "2x",
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "Icon152.png"
+    },
+    {
+      "scale": "2x",
+      "size": "83.5x83.5",
+      "idiom": "ipad",
+      "filename": "Icon167.png"
+    },
+    {
+      "scale": "1x",
+      "size": "1024x1024",
+      "idiom": "ios-marketing",
+      "filename": "Icon1024.png"
+    }
+  ],
+  "properties": {},
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon1024.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon1024.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon120.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon120.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon152.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon152.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon167.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon167.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon180.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon180.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon20.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon20.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon29.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon29.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon40.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon40.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon58.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon58.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon60.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon60.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon76.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon76.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon80.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon80.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon87.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Assets.xcassets/AppIcon.appiconset/Icon87.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Entitlements.plist
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Entitlements.plist
@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+</dict>
+</plist>
+
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Info.plist
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Info.plist
@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>UIDeviceFamily</key>
+    <array>
+        <integer>1</integer>
+        <integer>2</integer>
+    </array>
+    <key>UISupportedInterfaceOrientations</key>
+    <array>
+        <string>UIInterfaceOrientationPortrait</string>
+        <string>UIInterfaceOrientationLandscapeLeft</string>
+        <string>UIInterfaceOrientationLandscapeRight</string>
+    </array>
+    <key>UISupportedInterfaceOrientations~ipad</key>
+    <array>
+        <string>UIInterfaceOrientationPortrait</string>
+        <string>UIInterfaceOrientationPortraitUpsideDown</string>
+        <string>UIInterfaceOrientationLandscapeLeft</string>
+        <string>UIInterfaceOrientationLandscapeRight</string>
+    </array>
+    <key>MinimumOSVersion</key>
+    <string>8.0</string>
+    <key>CFBundleDisplayName</key>
+    <string>NoShellPerformance</string>
+    <key>CFBundleIdentifier</key>
+    <string>com.companyname.NoShellPerformance</string>
+    <key>CFBundleVersion</key>
+    <string>1.0</string>
+    <key>UILaunchStoryboardName</key>
+    <string>LaunchScreen</string>
+    <key>CFBundleName</key>
+    <string>NoShellPerformance</string>
+    <key>XSAppIconAssets</key>
+    <string>Assets.xcassets/AppIcon.appiconset</string>
+</dict>
+</plist>
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Main.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Main.cs
@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using Foundation;
+using UIKit;
+
+namespace NoShellPerformance.iOS
+{
+    public class Application
+    {
+        // This is the main entry point of the application.
+        static void Main(string[] args)
+        {
+            // if you want to use a different Application Delegate class from "AppDelegate"
+            // you can specify it here.
+            UIApplication.Main(args, null, "AppDelegate");
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/NoShellPerformance.iOS.csproj
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/NoShellPerformance.iOS.csproj
@ -0,0 +1,147 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">iPhoneSimulator</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{71F206F6-33B4-4FEA-8FEC-577B723A1DBB}</ProjectGuid>
+    <ProjectTypeGuids>{FEACFBD2-3405-455C-9665-78FE426C6842};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <TemplateGuid>{89a4fe7c-635d-49c9-8d8c-5cd363c0d68d}</TemplateGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>NoShellPerformance.iOS</RootNamespace>
+    <IPhoneResourcePrefix>Resources</IPhoneResourcePrefix>
+    <AssemblyName>NoShellPerformance.iOS</AssemblyName>
+    <MtouchEnableSGenConc>true</MtouchEnableSGenConc>
+    <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Debug</OutputPath>
+    <DefineConstants>DEBUG</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <MtouchArch>x86_64</MtouchArch>
+    <MtouchLink>None</MtouchLink>
+    <MtouchDebug>true</MtouchDebug>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhoneSimulator' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchLink>None</MtouchLink>
+    <MtouchArch>x86_64</MtouchArch>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhone' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhone\Debug</OutputPath>
+    <DefineConstants>DEBUG</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <MtouchArch>ARM64</MtouchArch>
+    <CodesignKey>iPhone Developer</CodesignKey>
+    <MtouchDebug>true</MtouchDebug>
+    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhone' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhone\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchArch>ARM64</MtouchArch>
+    <ConsolePause>false</ConsolePause>
+    <CodesignKey>iPhone Developer</CodesignKey>
+    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="Main.cs" />
+    <Compile Include="AppDelegate.cs" />
+    <Compile Include="Services\ProfilerService.cs" />
+    <None Include="Entitlements.plist" />
+    <None Include="Info.plist" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Contents.json">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon1024.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon180.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon167.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon152.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon120.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon87.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon80.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon76.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon60.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon58.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon40.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon29.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon20.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <BundleResource Include="Resources\tab_about.png" />
+    <BundleResource Include="Resources\tab_about%402x.png" />
+    <BundleResource Include="Resources\tab_about%403x.png" />
+    <BundleResource Include="Resources\tab_feed.png" />
+    <BundleResource Include="Resources\tab_feed%402x.png" />
+    <BundleResource Include="Resources\tab_feed%403x.png" />
+    <BundleResource Include="Resources\xamarin_logo.png" />
+    <BundleResource Include="Resources\xamarin_logo%402x.png" />
+    <BundleResource Include="Resources\xamarin_logo%403x.png" />
+    <InterfaceDefinition Include="Resources\LaunchScreen.storyboard" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Core" />
+    <Reference Include="Xamarin.iOS" />
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="3.6.0.344457" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.1.0" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />
+  <ItemGroup>
+    <ProjectReference Include="..\NoShellPerformance\NoShellPerformance.csproj">
+      <Project>{8A7F400C-2ED8-463D-A378-1EE41AD4E845}</Project>
+      <Name>NoShellPerformance</Name>
+    </ProjectReference>
+  </ItemGroup>
+</Project>
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Properties/AssemblyInfo.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Properties/AssemblyInfo.cs
@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("NoShellPerformance.iOS")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("NoShellPerformance.iOS")]
+[assembly: AssemblyCopyright("Copyright ©  2014")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("72bdc44f-c588-44f3-b6df-9aace7daafdd")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default-568h@2x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default-568h@2x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default-Portrait.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default-Portrait.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default-Portrait@2x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default-Portrait@2x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default@2x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/Default@2x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/LaunchScreen.storyboard
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/LaunchScreen.storyboard
@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6245" systemVersion="13F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="X5k-f2-b5h">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6238"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="gAE-YM-kbH">
+            <objects>
+                <viewController id="X5k-f2-b5h" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Y8P-hJ-Z43"/>
+                        <viewControllerLayoutGuide type="bottom" id="9ZL-r4-8FZ"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="yd7-JS-zBw">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" misplaced="YES" image="Icon-60.png" translatesAutoresizingMaskIntoConstraints="NO" id="23">
+                                <rect key="frame" x="270" y="270" width="60" height="60"/>
+                                <rect key="contentStretch" x="0.0" y="0.0" width="0.0" height="0.0"/>
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="0.20392156862745098" green="0.59607843137254901" blue="0.85882352941176465" alpha="1" colorSpace="calibratedRGB"/>
+                        <constraints>
+                            <constraint firstItem="23" firstAttribute="centerY" secondItem="yd7-JS-zBw" secondAttribute="centerY" priority="1" id="39"/>
+                            <constraint firstItem="23" firstAttribute="centerX" secondItem="yd7-JS-zBw" secondAttribute="centerX" priority="1" id="41"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="XAI-xm-WK6" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="349" y="339"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="Icon-60.png" width="180" height="180"/>
+    </resources>
+</document>
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_about.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_about.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_about@2x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_about@2x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_about@3x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_about@3x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_feed.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_feed.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_feed@2x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_feed@2x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_feed@3x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/tab_feed@3x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/xamarin_logo.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/xamarin_logo.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/xamarin_logo@2x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/xamarin_logo@2x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/xamarin_logo@3x.png
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Resources/xamarin_logo@3x.png
--- a/Shell/NoShellPerformance/NoShellPerformance.iOS/Services/ProfilerService.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance.iOS/Services/ProfilerService.cs
@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using NoShellPerformance.Services;
+
+namespace NoShellPerformance.iOS.Services
+{
+    public class ProfilerService : IProfilerService
+    {
+        public DateTime? GetStartupTime()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Task<Dictionary<string, TimeSpan?>> GetTimingsSinceStartup()
+        {
+            throw new NotImplementedException();
+        }
+
+        public void RegisterEvent(string eventName)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/App.xaml
+++ b/Shell/NoShellPerformance/NoShellPerformance/App.xaml
@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Application xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="NoShellPerformance.App">
+
+    <Application.Resources>
+        <ResourceDictionary>
+            <!--Global Styles-->
+            <Color x:Key="NavigationPrimary">#2196F3</Color>
+            <Style TargetType="NavigationPage">
+                <Setter Property="BarBackgroundColor" Value="{StaticResource NavigationPrimary}" />
+                <Setter Property="BarTextColor" Value="White" />
+            </Style>
+        </ResourceDictionary>
+    </Application.Resources>
+    
+</Application>
--- a/Shell/NoShellPerformance/NoShellPerformance/App.xaml.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/App.xaml.cs
@ -0,0 +1,33 @@
+using Xamarin.Forms;
+using NoShellPerformance.Services;
+using NoShellPerformance.Views;
+
+namespace NoShellPerformance
+{
+    public partial class App : Application
+    {
+        public static IProfilerService ProfilerService { get; set; } = DependencyService.Get<IProfilerService>();
+
+        public App()
+        {
+            InitializeComponent();
+            DependencyService.Register<MockDataStore>();
+            MainPage = new MainPage();
+        }
+
+        protected override void OnStart()
+        {
+            ProfilerService.RegisterEvent("Xamarin.Forms App OnStart");
+        }
+
+        protected override void OnSleep()
+        {
+            // Handle when your app sleeps
+        }
+
+        protected override void OnResume()
+        {
+            // Handle when your app resumes
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/AssemblyInfo.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/AssemblyInfo.cs
@ -0,0 +1,3 @@
+using Xamarin.Forms.Xaml;
+
+[assembly: XamlCompilation(XamlCompilationOptions.Compile)]
--- a/Shell/NoShellPerformance/NoShellPerformance/Extensions/TimeSpanExtensions.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Extensions/TimeSpanExtensions.cs
@ -0,0 +1,48 @@
+using System;
+
+namespace NoShellPerformance.Extensions
+{
+    public static class TimeSpanExtensions
+    {
+        public static string ToCanonicString(this TimeSpan? timeSpan)
+        {
+            if (!timeSpan.HasValue)
+            {
+                return "-";
+            }
+            return timeSpan.Value.ToCanonicString();
+        }
+
+        public static string ToCanonicString(this TimeSpan timeSpan, int secondsToSkipMsPart = 40)
+        {
+            int totalDays = (int)timeSpan.TotalDays;
+
+            if (totalDays > 0)
+            {
+                return $"{totalDays}d{timeSpan.Hours}h{timeSpan.Minutes}m{timeSpan.Seconds}s";
+            }
+
+            if (timeSpan.Hours > 0)
+            {
+                return $"{timeSpan.Hours}h{timeSpan.Minutes}m{timeSpan.Seconds}s";
+            }
+
+            if (timeSpan.Minutes > 0)
+            {
+                return $"{timeSpan.Minutes}m{timeSpan.Seconds}s";
+            }
+
+            if (timeSpan.Seconds < 1)
+            {
+                return $"{timeSpan.Milliseconds}ms";
+            }
+
+            if (timeSpan.Seconds < secondsToSkipMsPart)
+            {
+                return $"{timeSpan.Seconds}s{timeSpan.Milliseconds}ms";
+            }
+
+            return $"{timeSpan.Seconds}s";
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Models/Item.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Models/Item.cs
@ -0,0 +1,11 @@
+using System;
+
+namespace NoShellPerformance.Models
+{
+    public class Item
+    {
+        public string Id { get; set; }
+        public string Text { get; set; }
+        public string Description { get; set; }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Models/Timing.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Models/Timing.cs
@ -0,0 +1,17 @@
+using NoShellPerformance.Extensions;
+using System;
+
+namespace NoShellPerformance.Models
+{
+    public class Timing
+    {
+        public Timing(string eventName, TimeSpan? elapsedTime)
+        {
+            EventName = eventName;
+            ElapsedTime = elapsedTime?.ToCanonicString();
+        }
+
+        public string EventName { get; }
+        public string ElapsedTime { get; }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/NoShellPerformance.csproj
+++ b/Shell/NoShellPerformance/NoShellPerformance/NoShellPerformance.csproj
@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <ProduceReferenceAssembly>true</ProduceReferenceAssembly>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <DebugType>pdbonly</DebugType>
+    <DebugSymbols>true</DebugSymbols>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="3.6.0.344457" />  
+    <PackageReference Include="Xamarin.Essentials" Version="1.1.0" />
+  </ItemGroup>
+</Project>
--- a/Shell/NoShellPerformance/NoShellPerformance/Services/IDataStore.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Services/IDataStore.cs
@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace NoShellPerformance.Services
+{
+    public interface IDataStore<T>
+    {
+        Task<bool> AddItemAsync(T item);
+        Task<bool> UpdateItemAsync(T item);
+        Task<bool> DeleteItemAsync(string id);
+        Task<T> GetItemAsync(string id);
+        Task<IEnumerable<T>> GetItemsAsync(bool forceRefresh = false);
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Services/IProfilerService.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Services/IProfilerService.cs
@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace NoShellPerformance.Services
+{
+    public interface IProfilerService
+    {
+        void RegisterEvent(string eventName);
+        Task<Dictionary<string, TimeSpan?>> GetTimingsSinceStartup();
+        DateTime? GetStartupTime();
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Services/MockDataStore.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Services/MockDataStore.cs
@ -0,0 +1,66 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using NoShellPerformance.Models;
+
+namespace NoShellPerformance.Services
+{
+    public class MockDataStore : IDataStore<Item>
+    {
+        List<Item> items;
+
+        public MockDataStore()
+        {
+            items = new List<Item>();
+            var mockItems = new List<Item>
+            {
+                new Item { Id = Guid.NewGuid().ToString(), Text = "First item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Second item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Third item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Fourth item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Fifth item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Sixth item", Description="This is an item description." }
+            };
+
+            foreach (var item in mockItems)
+            {
+                items.Add(item);
+            }
+        }
+
+        public async Task<bool> AddItemAsync(Item item)
+        {
+            items.Add(item);
+
+            return await Task.FromResult(true);
+        }
+
+        public async Task<bool> UpdateItemAsync(Item item)
+        {
+            var oldItem = items.Where((Item arg) => arg.Id == item.Id).FirstOrDefault();
+            items.Remove(oldItem);
+            items.Add(item);
+
+            return await Task.FromResult(true);
+        }
+
+        public async Task<bool> DeleteItemAsync(string id)
+        {
+            var oldItem = items.Where((Item arg) => arg.Id == id).FirstOrDefault();
+            items.Remove(oldItem);
+
+            return await Task.FromResult(true);
+        }
+
+        public async Task<Item> GetItemAsync(string id)
+        {
+            return await Task.FromResult(items.FirstOrDefault(s => s.Id == id));
+        }
+
+        public async Task<IEnumerable<Item>> GetItemsAsync(bool forceRefresh = false)
+        {
+            return await Task.FromResult(items);
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/ViewModels/AboutViewModel.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/ViewModels/AboutViewModel.cs
@ -0,0 +1,19 @@
+using System;
+using System.Windows.Input;
+
+using Xamarin.Forms;
+
+namespace NoShellPerformance.ViewModels
+{
+    public class AboutViewModel : BaseViewModel
+    {
+        public AboutViewModel()
+        {
+            Title = "About";
+
+            OpenWebCommand = new Command(() => Device.OpenUri(new Uri("https://xamarin.com/platform")));
+        }
+
+        public ICommand OpenWebCommand { get; }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/ViewModels/BaseViewModel.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/ViewModels/BaseViewModel.cs
@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+using Xamarin.Forms;
+
+using NoShellPerformance.Models;
+using NoShellPerformance.Services;
+
+namespace NoShellPerformance.ViewModels
+{
+    public class BaseViewModel : INotifyPropertyChanged
+    {
+        public IDataStore<Item> DataStore => DependencyService.Get<IDataStore<Item>>() ?? new MockDataStore();
+
+        bool isBusy = false;
+        public bool IsBusy
+        {
+            get { return isBusy; }
+            set { SetProperty(ref isBusy, value); }
+        }
+
+        string title = string.Empty;
+        public string Title
+        {
+            get { return title; }
+            set { SetProperty(ref title, value); }
+        }
+
+        protected bool SetProperty<T>(ref T backingStore, T value,
+            [CallerMemberName]string propertyName = "",
+            Action onChanged = null)
+        {
+            if (EqualityComparer<T>.Default.Equals(backingStore, value))
+                return false;
+
+            backingStore = value;
+            onChanged?.Invoke();
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+
+        #region INotifyPropertyChanged
+        public event PropertyChangedEventHandler PropertyChanged;
+        protected void OnPropertyChanged([CallerMemberName] string propertyName = "")
+        {
+            var changed = PropertyChanged;
+            if (changed == null)
+                return;
+
+            changed.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+        #endregion
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/ViewModels/ItemDetailViewModel.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/ViewModels/ItemDetailViewModel.cs
@ -0,0 +1,16 @@
+using System;
+
+using NoShellPerformance.Models;
+
+namespace NoShellPerformance.ViewModels
+{
+    public class ItemDetailViewModel : BaseViewModel
+    {
+        public Item Item { get; set; }
+        public ItemDetailViewModel(Item item = null)
+        {
+            Title = item?.Text;
+            Item = item;
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/ViewModels/ItemsViewModel.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/ViewModels/ItemsViewModel.cs
@ -0,0 +1,76 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.Threading.Tasks;
+using Xamarin.Forms;
+using NoShellPerformance.Models;
+using NoShellPerformance.Views;
+using NoShellPerformance.Services;
+using System.Linq;
+
+namespace NoShellPerformance.ViewModels
+{
+    public class ItemsViewModel : BaseViewModel
+    {
+        private IProfilerService _profilerService;
+
+        string timing;
+        public string Timing
+        {
+            get { return timing; }
+            set { SetProperty(ref timing, value); }
+        }
+        public ObservableCollection<Item> Items { get; set; }
+        public Command LoadItemsCommand { get; set; }
+
+        public ItemsViewModel(IProfilerService profilerService)
+        {
+            _profilerService = profilerService;
+
+            Title = "Browse";
+            Items = new ObservableCollection<Item>();
+            LoadItemsCommand = new Command(async () => await ExecuteLoadItemsCommand());
+
+            MessagingCenter.Subscribe<NewItemPage, Item>(this, "AddItem", async (obj, item) =>
+            {
+                var newItem = item as Item;
+                Items.Add(newItem);
+                await DataStore.AddItemAsync(newItem);
+            });
+        }
+
+        async Task ExecuteLoadItemsCommand()
+        {
+            if (IsBusy)
+                return;
+
+            IsBusy = true;
+
+            try
+            {
+                var data = await _profilerService.GetTimingsSinceStartup();
+
+                var timing = data                 
+                    .Select(t => new Timing(t.Key, t.Value))
+                    .First();
+
+                Timing = timing.ElapsedTime;
+
+                Items.Clear();
+                var items = await DataStore.GetItemsAsync(true);
+                foreach (var item in items)
+                {
+                    Items.Add(item);
+                }
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine(ex);
+            }
+            finally
+            {
+                IsBusy = false;
+            }
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/AboutPage.xaml
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/AboutPage.xaml
@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="NoShellPerformance.Views.AboutPage"
+             xmlns:vm="clr-namespace:NoShellPerformance.ViewModels"
+             Title="{Binding Title}">
+    
+    <ContentPage.BindingContext>
+        <vm:AboutViewModel />
+    </ContentPage.BindingContext>
+    
+    <ContentPage.Resources>
+        <ResourceDictionary>
+            <Color x:Key="Primary">#2196F3</Color>
+            <Color x:Key="Accent">#96d1ff</Color>
+            <Color x:Key="LightTextColor">#999999</Color>
+        </ResourceDictionary>
+    </ContentPage.Resources>
+
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="*" />
+        </Grid.RowDefinitions>
+        <StackLayout BackgroundColor="{StaticResource Accent}" VerticalOptions="FillAndExpand" HorizontalOptions="Fill">
+            <StackLayout Orientation="Horizontal" HorizontalOptions="Center" VerticalOptions="Center">
+                <ContentView Padding="0,40,0,40" VerticalOptions="FillAndExpand">
+                    <Image Source="xamarin_logo.png" VerticalOptions="Center" HeightRequest="64" />
+                </ContentView>
+            </StackLayout>
+        </StackLayout>
+        <ScrollView Grid.Row="1">
+            <StackLayout Orientation="Vertical" Padding="16,40,16,40" Spacing="10">
+                <Label FontSize="22">
+                    <Label.FormattedText>
+                        <FormattedString>
+                            <FormattedString.Spans>
+                                <Span Text="AppName" FontAttributes="Bold" FontSize="22" />
+                                <Span Text=" " />
+                                <Span Text="1.0" ForegroundColor="{StaticResource LightTextColor}" />
+                            </FormattedString.Spans>
+                        </FormattedString>
+                    </Label.FormattedText>
+                </Label>
+                <Label>
+                    <Label.FormattedText>
+                        <FormattedString>
+                            <FormattedString.Spans>
+                                <Span Text="This app is written in C# and native APIs using the" />
+                                <Span Text=" " />
+                                <Span Text="Xamarin Platform" FontAttributes="Bold" />
+                                <Span Text="." />
+                            </FormattedString.Spans>
+                        </FormattedString>
+                    </Label.FormattedText>
+                </Label>
+                <Label>
+                    <Label.FormattedText>
+                        <FormattedString>
+                            <FormattedString.Spans>
+                                <Span Text="It shares code with its" />
+                                <Span Text=" " />
+                                <Span Text="iOS, Android, and Windows" FontAttributes="Bold" />
+                                <Span Text=" " />
+                                <Span Text="versions." />
+                            </FormattedString.Spans>
+                        </FormattedString>
+                    </Label.FormattedText>
+                </Label>
+                <Button Margin="0,10,0,0" Text="Learn more"
+                        Command="{Binding OpenWebCommand}"
+                        BackgroundColor="{StaticResource Primary}"
+                        TextColor="White" />
+            </StackLayout>
+        </ScrollView>
+    </Grid>
+    
+</ContentPage>
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/AboutPage.xaml.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/AboutPage.xaml.cs
@ -0,0 +1,16 @@
+using System.ComponentModel;
+using Xamarin.Forms;
+
+namespace NoShellPerformance.Views
+{
+    // Learn more about making custom code visible in the Xamarin.Forms previewer
+    // by visiting https://aka.ms/xamarinforms-previewer
+    [DesignTimeVisible(false)]
+    public partial class AboutPage : ContentPage
+    {
+        public AboutPage()
+        {
+            InitializeComponent();
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/ItemDetailPage.xaml
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/ItemDetailPage.xaml
@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="NoShellPerformance.Views.ItemDetailPage"
+             Title="{Binding Title}">
+
+    <StackLayout Spacing="20" Padding="15">
+        <Label Text="Text:" FontSize="Medium" />
+        <Label Text="{Binding Item.Text}" d:Text="Item name" FontSize="Small"/>
+        <Label Text="Description:" FontSize="Medium" />
+        <Label Text="{Binding Item.Description}" d:Text="Item description" FontSize="Small"/>
+    </StackLayout>
+    
+</ContentPage>
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/ItemDetailPage.xaml.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/ItemDetailPage.xaml.cs
@ -0,0 +1,36 @@
+using System.ComponentModel;
+using Xamarin.Forms;
+using NoShellPerformance.Models;
+using NoShellPerformance.ViewModels;
+
+namespace NoShellPerformance.Views
+{
+    // Learn more about making custom code visible in the Xamarin.Forms previewer
+    // by visiting https://aka.ms/xamarinforms-previewer
+    [DesignTimeVisible(false)]
+    public partial class ItemDetailPage : ContentPage
+    {
+        ItemDetailViewModel viewModel;
+
+        public ItemDetailPage(ItemDetailViewModel viewModel)
+        {
+            InitializeComponent();
+
+            BindingContext = this.viewModel = viewModel;
+        }
+
+        public ItemDetailPage()
+        {
+            InitializeComponent();
+
+            var item = new Item
+            {
+                Text = "Item 1",
+                Description = "This is an item description."
+            };
+
+            viewModel = new ItemDetailViewModel(item);
+            BindingContext = viewModel;
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/ItemsPage.xaml
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/ItemsPage.xaml
@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="NoShellPerformance.Views.ItemsPage"
+             Title="{Binding Title}"
+             x:Name="BrowseItemsPage">
+    <ContentPage.ToolbarItems>
+        <ToolbarItem Text="Add" Clicked="AddItem_Clicked" />
+    </ContentPage.ToolbarItems>
+    <StackLayout>
+        <Label 
+            Text="{Binding Timing}"
+            Margin="6" />
+        <ListView x:Name="ItemsListView"
+                ItemsSource="{Binding Items}"
+                VerticalOptions="FillAndExpand"
+                HasUnevenRows="true"
+                RefreshCommand="{Binding LoadItemsCommand}"
+                IsPullToRefreshEnabled="true"
+                IsRefreshing="{Binding IsBusy, Mode=OneWay}"
+                CachingStrategy="RecycleElement"
+                ItemSelected="OnItemSelected">
+            <d:ListView.ItemsSource>
+                <x:Array Type="{x:Type x:String}">
+                    <x:String>First Item</x:String>
+                    <x:String>Second Item</x:String>
+                    <x:String>Third Item</x:String>
+                    <x:String>Forth Item</x:String>
+                    <x:String>Fifth Item</x:String>
+                    <x:String>Sixth Item</x:String>
+                </x:Array>
+            </d:ListView.ItemsSource>
+            <ListView.ItemTemplate>
+                <DataTemplate>
+                    <ViewCell>
+                        <StackLayout Padding="10">
+                            <Label Text="{Binding Text}" 
+                                d:Text="{Binding .}"
+                                LineBreakMode="NoWrap" 
+                                Style="{DynamicResource ListItemTextStyle}" 
+                                FontSize="16" />
+                            <Label Text="{Binding Description}" 
+                                d:Text="Item description"
+                                LineBreakMode="NoWrap"
+                                Style="{DynamicResource ListItemDetailTextStyle}"
+                                FontSize="13" />
+                        </StackLayout>
+                    </ViewCell>
+                </DataTemplate>
+            </ListView.ItemTemplate>
+        </ListView>
+    </StackLayout>
+</ContentPage>
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/ItemsPage.xaml.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/ItemsPage.xaml.cs
@ -0,0 +1,49 @@
+using System;
+using System.ComponentModel;
+using Xamarin.Forms;
+using NoShellPerformance.Models;
+using NoShellPerformance.ViewModels;
+using NoShellPerformance.Services;
+
+namespace NoShellPerformance.Views
+{
+    // Learn more about making custom code visible in the Xamarin.Forms previewer
+    // by visiting https://aka.ms/xamarinforms-previewer
+    [DesignTimeVisible(false)]
+    public partial class ItemsPage : ContentPage
+    {
+        ItemsViewModel viewModel;
+
+        public ItemsPage()
+        {
+            InitializeComponent();
+
+            BindingContext = viewModel = new ItemsViewModel(DependencyService.Get<IProfilerService>());
+        }
+
+        async void OnItemSelected(object sender, SelectedItemChangedEventArgs args)
+        {
+            var item = args.SelectedItem as Item;
+            if (item == null)
+                return;
+
+            await Navigation.PushAsync(new ItemDetailPage(new ItemDetailViewModel(item)));
+
+            // Manually deselect item.
+            ItemsListView.SelectedItem = null;
+        }
+
+        async void AddItem_Clicked(object sender, EventArgs e)
+        {
+            await Navigation.PushModalAsync(new NavigationPage(new NewItemPage()));
+        }
+
+        protected override void OnAppearing()
+        {
+            base.OnAppearing();
+
+            if (viewModel.Items.Count == 0)
+                viewModel.LoadItemsCommand.Execute(null);
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/MainPage.xaml
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/MainPage.xaml
@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
+            xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+            xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+            xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+            mc:Ignorable="d"
+            xmlns:views="clr-namespace:NoShellPerformance.Views"
+            x:Class="NoShellPerformance.Views.MainPage">
+
+    <TabbedPage.Children>
+        <NavigationPage Title="Browse">
+            <NavigationPage.Icon>
+                <OnPlatform x:TypeArguments="FileImageSource">
+                    <On Platform="iOS" Value="tab_feed.png"/>
+                </OnPlatform>
+            </NavigationPage.Icon>
+            <x:Arguments>
+                <views:ItemsPage />
+            </x:Arguments>
+        </NavigationPage>
+        
+        <NavigationPage Title="About">
+            <NavigationPage.Icon>
+                <OnPlatform x:TypeArguments="FileImageSource">
+                    <On Platform="iOS" Value="tab_about.png"/>
+                </OnPlatform>
+            </NavigationPage.Icon>
+            <x:Arguments>
+                <views:AboutPage />
+            </x:Arguments>
+        </NavigationPage>
+    </TabbedPage.Children>
+    
+</TabbedPage>
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/MainPage.xaml.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/MainPage.xaml.cs
@ -0,0 +1,16 @@
+using System.ComponentModel;
+using Xamarin.Forms;
+
+namespace NoShellPerformance.Views
+{
+    // Learn more about making custom code visible in the Xamarin.Forms previewer
+    // by visiting https://aka.ms/xamarinforms-previewer
+    [DesignTimeVisible(false)]
+    public partial class MainPage : TabbedPage
+    {
+        public MainPage()
+        {
+            InitializeComponent();
+        }
+    }
+}
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/NewItemPage.xaml
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/NewItemPage.xaml
@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="NoShellPerformance.Views.NewItemPage"
+             Title="New Item">
+    
+    <ContentPage.ToolbarItems>
+        <ToolbarItem Text="Cancel" Clicked="Cancel_Clicked" />
+        <ToolbarItem Text="Save" Clicked="Save_Clicked" />
+    </ContentPage.ToolbarItems>
+    
+    <ContentPage.Content>
+        <StackLayout Spacing="20" Padding="15">
+            <Label Text="Text" FontSize="Medium" />
+            <Entry Text="{Binding Item.Text}" d:Text="Item name" FontSize="Small" />
+            <Label Text="Description" FontSize="Medium" />
+            <Editor Text="{Binding Item.Description}" d:Text="Item description" FontSize="Small" Margin="0" />
+        </StackLayout>
+    </ContentPage.Content>
+    
+</ContentPage>
--- a/Shell/NoShellPerformance/NoShellPerformance/Views/NewItemPage.xaml.cs
+++ b/Shell/NoShellPerformance/NoShellPerformance/Views/NewItemPage.xaml.cs
@ -0,0 +1,40 @@
+using System;
+using System.ComponentModel;
+using Xamarin.Forms;
+
+using NoShellPerformance.Models;
+
+namespace NoShellPerformance.Views
+{
+    // Learn more about making custom code visible in the Xamarin.Forms previewer
+    // by visiting https://aka.ms/xamarinforms-previewer
+    [DesignTimeVisible(false)]
+    public partial class NewItemPage : ContentPage
+    {
+        public Item Item { get; set; }
+
+        public NewItemPage()
+        {
+            InitializeComponent();
+
+            Item = new Item
+            {
+                Text = "Item name",
+                Description = "This is an item description."
+            };
+
+            BindingContext = this;
+        }
+
+        async void Save_Clicked(object sender, EventArgs e)
+        {
+            MessagingCenter.Send(this, "AddItem", Item);
+            await Navigation.PopModalAsync();
+        }
+
+        async void Cancel_Clicked(object sender, EventArgs e)
+        {
+            await Navigation.PopModalAsync();
+        }
+    }
+}
--- a/src/Shell/Shell/ShellPerformance.sln
+++ b/src/Shell/Shell/ShellPerformance.sln
@ -0,0 +1,83 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.28917.182
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ShellPerformance.Android", "ShellPerformance\ShellPerformance.Android\ShellPerformance.Android.csproj", "{E39BDE12-F469-417E-B12D-7028A7AD62AD}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ShellPerformance.iOS", "ShellPerformance\ShellPerformance.iOS\ShellPerformance.iOS.csproj", "{0F2149E1-CD43-4EA3-B721-939E520D5166}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ShellPerformance", "ShellPerformance\ShellPerformance\ShellPerformance.csproj", "{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|iPhone = Debug|iPhone
+		Debug|iPhoneSimulator = Debug|iPhoneSimulator
+		Release|Any CPU = Release|Any CPU
+		Release|iPhone = Release|iPhone
+		Release|iPhoneSimulator = Release|iPhoneSimulator
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|iPhone.Deploy.0 = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Debug|iPhoneSimulator.Deploy.0 = Debug|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|Any CPU.Deploy.0 = Release|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|iPhone.ActiveCfg = Release|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|iPhone.Build.0 = Release|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|iPhone.Deploy.0 = Release|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{E39BDE12-F469-417E-B12D-7028A7AD62AD}.Release|iPhoneSimulator.Deploy.0 = Release|Any CPU
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|Any CPU.ActiveCfg = Debug|iPhoneSimulator
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|Any CPU.Build.0 = Debug|iPhoneSimulator
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|Any CPU.Deploy.0 = Debug|iPhoneSimulator
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|iPhone.ActiveCfg = Debug|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|iPhone.Build.0 = Debug|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|iPhone.Deploy.0 = Debug|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|iPhoneSimulator.ActiveCfg = Debug|iPhoneSimulator
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Debug|iPhoneSimulator.Deploy.0 = Debug|iPhoneSimulator
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|Any CPU.ActiveCfg = Release|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|Any CPU.Build.0 = Release|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|Any CPU.Deploy.0 = Release|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|iPhone.ActiveCfg = Release|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|iPhone.Build.0 = Release|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|iPhone.Deploy.0 = Release|iPhone
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
+		{0F2149E1-CD43-4EA3-B721-939E520D5166}.Release|iPhoneSimulator.Deploy.0 = Release|iPhoneSimulator
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|iPhone.Deploy.0 = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Debug|iPhoneSimulator.Deploy.0 = Debug|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|Any CPU.Deploy.0 = Release|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|iPhone.ActiveCfg = Release|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|iPhone.Build.0 = Release|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|iPhone.Deploy.0 = Release|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{EB90FB23-5C1D-4268-ACD2-D4947CBCD8AF}.Release|iPhoneSimulator.Deploy.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {1C78E1B5-82DE-44ED-A43F-BEA2681D0E2E}
+	EndGlobalSection
+EndGlobal
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Assets/AboutAssets.txt
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Assets/AboutAssets.txt
@ -0,0 +1,19 @@
+Any raw assets you want to be deployed with your application can be placed in
+this directory (and child directories) and given a Build Action of "AndroidAsset".
+
+These files will be deployed with you package and will be accessible using Android's
+AssetManager, like this:
+
+public class ReadAsset : Activity
+{
+    protected override void OnCreate (Bundle bundle)
+    {
+        base.OnCreate (bundle);
+
+        InputStream input = Assets.Open ("my_asset.txt");
+    }
+}
+
+Additionally, some Android functions will automatically load asset files:
+
+Typeface tf = Typeface.CreateFromAsset (Context.Assets, "fonts/samplefont.ttf");
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Helpers/ProfilerTimeHelper.cs
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Helpers/ProfilerTimeHelper.cs
@ -0,0 +1,67 @@
+using System;
+using System.Globalization;
+using Java.IO;
+using Java.Lang;
+
+namespace ShellPerformance.Droid.Helpers
+{
+    // Based on: https://github.com/toomasz/XamarinAppStartupTime
+    // By Tomasz Ścisłowicz
+    public class ProfilerTimeHelper
+    {
+        const string LogcatTimeFormat = "yyyy-MM-dd HH:mm:ss.fff";
+
+        private static DateTime? StartupTime;
+        private static bool _attemptedToGetStartupTime;
+
+        public static DateTime? GetAppStartupTime()
+        {
+            if (_attemptedToGetStartupTime)
+            {
+                return StartupTime;
+            }
+            if (!StartupTime.HasValue)
+            {
+                StartupTime = GetStartupTimeFromLogcat();
+                _attemptedToGetStartupTime = true;
+            }
+            return StartupTime;
+        }
+
+        private static DateTime? GetStartupTimeFromLogcat()
+        {
+            var pid = Android.OS.Process.MyPid();
+
+            var process = new ProcessBuilder().
+                RedirectErrorStream(true).
+                Command("/system/bin/logcat", $"--pid={pid}", "-m", "1", "-v", "year").Start();
+
+            using (var bufferedReader = new BufferedReader(new InputStreamReader(process.InputStream)))
+            {
+                string line = null;
+                while ((line = bufferedReader.ReadLine()) != null)
+                {
+                    if (ParseLogDateTime(line, out DateTime date))
+                    {
+                        return date;
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        private static bool ParseLogDateTime(string logLine, out DateTime dateTime)
+        {
+            if (logLine.Length < LogcatTimeFormat.Length)
+            {
+                dateTime = new DateTime();
+                return false;
+            }
+            var timeStr = logLine.Substring(0, LogcatTimeFormat.Length);
+
+            return DateTime.TryParseExact(timeStr, LogcatTimeFormat,
+                CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal, out dateTime);
+        }
+    }
+}
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/MainActivity.cs
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/MainActivity.cs
@ -0,0 +1,38 @@
+using Android.App;
+using Android.Content.PM;
+using Android.Runtime;
+using Android.OS;
+using Xamarin.Forms;
+using ShellPerformance.Droid.Services;
+
+namespace ShellPerformance.Droid
+{
+    [Activity(
+        Label = "ShellPerformance", 
+        Icon = "@mipmap/icon", 
+        Theme = "@style/MainTheme", 
+        MainLauncher = true, 
+        ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
+    public class MainActivity : Xamarin.Forms.Platform.Android.FormsAppCompatActivity
+    {
+        protected override void OnCreate(Bundle savedInstanceState)
+        {
+            TabLayoutResource = Resource.Layout.Tabbar;
+            ToolbarResource = Resource.Layout.Toolbar;
+
+            base.OnCreate(savedInstanceState);
+
+            Forms.SetFlags("Shell_Experimental", "Visual_Experimental", "CollectionView_Experimental", "FastRenderers_Experimental");
+            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
+            Forms.Init(this, savedInstanceState);
+            DependencyService.Register<ProfilerService>();
+            LoadApplication(new App());
+        }
+        public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
+        {
+            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
+
+            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
+        }
+    }
+}
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Properties/AndroidManifest.xml
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Properties/AndroidManifest.xml
@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.ShellPerformance">
+    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
+    <application android:label="ShellPerformance.Android"></application>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+</manifest>
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Properties/AssemblyInfo.cs
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Properties/AssemblyInfo.cs
@ -0,0 +1,34 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using Android.App;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("ShellPerformance.Android")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("ShellPerformance.Android")]
+[assembly: AssemblyCopyright("Copyright ©  2014")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: ComVisible(false)]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+
+// Add some common permissions, these can be removed if not needed
+[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
+[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/AboutResources.txt
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/AboutResources.txt
@ -0,0 +1,50 @@
+Images, layout descriptions, binary blobs and string dictionaries can be included 
+in your application as resource files.  Various Android APIs are designed to 
+operate on the resource IDs instead of dealing with images, strings or binary blobs 
+directly.
+
+For example, a sample Android app that contains a user interface layout (main.xml),
+an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png) 
+would keep its resources in the "Resources" directory of the application:
+
+Resources/
+    drawable-hdpi/
+        icon.png
+
+    drawable-ldpi/
+        icon.png
+
+    drawable-mdpi/
+        icon.png
+
+    layout/
+        main.xml
+
+    values/
+        strings.xml
+
+In order to get the build system to recognize Android resources, set the build action to
+"AndroidResource".  The native Android APIs do not operate directly with filenames, but 
+instead operate on resource IDs.  When you compile an Android application that uses resources, 
+the build system will package the resources for distribution and generate a class called
+"Resource" that contains the tokens for each one of the resources included. For example, 
+for the above Resources layout, this is what the Resource class would expose:
+
+public class Resource {
+    public class drawable {
+        public const int icon = 0x123;
+    }
+
+    public class layout {
+        public const int main = 0x456;
+    }
+
+    public class strings {
+        public const int first_string = 0xabc;
+        public const int second_string = 0xbcd;
+    }
+}
+
+You would then use R.drawable.icon to reference the drawable/icon.png file, or Resource.layout.main 
+to reference the layout/main.xml file, or Resource.strings.first_string to reference the first 
+string in the dictionary file values/strings.xml.
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/Resource.designer.cs
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/Resource.designer.cs
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/drawable/tab_about.png
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/drawable/tab_about.png
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/drawable/tab_feed.png
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/drawable/tab_feed.png
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/drawable/xamarin_logo.png
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/drawable/xamarin_logo.png
--- a/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/layout/Tabbar.axml
+++ b/src/Shell/Shell/ShellPerformance/ShellPerformance.Android/Resources/layout/Tabbar.axml
@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.TabLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/sliding_tabs"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    app:tabIndicatorColor="@android:color/white"
+    app:tabGravity="fill"
+    app:tabMode="fixed" />
--- a/Показать больше
+++ b/Показать больше