Adding BenchmarkDb (#9)

.gitignore

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+# Cake - Uncomment if you are using it
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+# !tools/packages.config
+korebuild-lock.txt
+/src/BenchmarkDb/results.csv
+/src/BenchmarkDb/results.md

src/BenchmarkDb/BenchmarkDb.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="MySqlConnector" Version="0.28.2" />
+    <PackageReference Include="Npgsql" Version="3.2.5" />
+    <PackageReference Include="System.Data.SqlClient" Version="4.4.0" />
+  </ItemGroup>
+
+</Project>

src/BenchmarkDb/Fortune.cs

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+namespace BenchmarkDb
+{
+    public class Fortune
+    {
+        public int Id { get; set; }
+        public string Message { get; set; }
+    }
+}

src/BenchmarkDb/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Data.Common;
+using System.Data.SqlClient;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using MySql.Data.MySqlClient;
+using Npgsql;
+
+namespace BenchmarkDb
+{
+    public class Program
+    {
+        static volatile int _counter = 0;
+        static volatile int _stopping = 0;
+
+        const int Warmup = 3;
+        const string SqlQuery = "SELECT id,message FROM fortune";
+        const string PostgreSql = nameof(PostgreSql);
+        const string MySql = nameof(MySql);
+        const string SqlServer = nameof(SqlServer);
+
+        static object synlock = new object();
+
+        public static async Task Main(string[] args)
+        {
+            if (args.Length < 3)
+            {
+                Console.WriteLine("usage: database connectionstring threads mode time(s) desc");
+                Environment.Exit(1);
+            }
+
+            var database = args[0];
+            var connectionString = args[1];
+
+            if (!int.TryParse(args[2], out int numThreads))
+            {
+                Console.WriteLine($"Invalid threads value: {args[2]}");
+                Environment.Exit(1);
+            }
+
+            string mode = args[3];
+
+            if (mode != "async" && mode != "sync")
+            {
+                Console.WriteLine("Accepted mode values: sync, async, sync+conn, async+conn");
+                Environment.Exit(1);
+            }
+
+            if (!int.TryParse(args[4], out int time))
+            {
+                Console.WriteLine($"Invalid time value: {args[4]}");
+                Environment.Exit(1);
+            }
+
+            DbProviderFactory factory = null;
+
+            switch (database)
+            {
+                case PostgreSql:
+                    factory = NpgsqlFactory.Instance;
+                    break;
+
+                case MySql:
+                    factory = MySqlClientFactory.Instance;
+                    break;
+
+                case SqlServer:
+                    factory = SqlClientFactory.Instance;
+                    break;
+
+                default:
+                    Console.WriteLine($"Accepted database values: {SqlServer}, {MySql}, {PostgreSql}");
+                    Environment.Exit(2);
+                    break;
+            }
+
+            var stopwatch = new Stopwatch();
+            var startTime = DateTime.UtcNow;
+            var stopTime = DateTime.UtcNow;
+            var lastDisplay = DateTime.UtcNow;
+            var totalTransactions = 0;
+            var listOfResults = new List<double>();
+
+            List<Task> tasks = null;
+            switch (mode)
+            {
+                case "sync":
+                    tasks = Enumerable.Range(1, numThreads).Select(_ => Task.Factory.StartNew(DoWorkSync, TaskCreationOptions.LongRunning)).ToList();
+                    break;
+
+                case "async":
+                    tasks = Enumerable.Range(1, numThreads).Select(_ => Task.Factory.StartNew(DoWorkAsync, TaskCreationOptions.LongRunning).Unwrap()).ToList();
+                    break;
+
+                case "sync+conn":
+                    tasks = Enumerable.Range(1, numThreads).Select(_ => Task.Factory.StartNew(DoWorkSyncReuseConnection, TaskCreationOptions.LongRunning)).ToList();
+                    break;
+
+                case "async+conn":
+                    tasks = Enumerable.Range(1, numThreads).Select(_ => Task.Factory.StartNew(DoWorkAsyncReuseConnection, TaskCreationOptions.LongRunning).Unwrap()).ToList();
+                    break;
+            }
+
+            // Displays and records the current status of the test
+            tasks.Add(
+                Task.Run(async () =>
+                {
+                    // Warmup
+                    Console.Write($"Warming up... {Warmup}s");
+                    await Task.Delay(TimeSpan.FromSeconds(Warmup));
+                    Console.SetCursorPosition(0, Console.CursorTop);
+
+                    startTime = DateTime.UtcNow;
+                    Interlocked.Exchange(ref _counter, 0);
+
+                    while (_stopping != 1)
+                    {
+                        await Task.Delay(200);
+                        var now = DateTime.UtcNow;
+                        var tps = (int) (_counter / (now - lastDisplay).TotalSeconds);
+                        var remaining = (int) (time - (now - startTime).TotalSeconds);
+                        listOfResults.Add(tps);
+
+                        Console.Write($"{tps} tps, {remaining}s                     ");
+                        Console.SetCursorPosition(0, Console.CursorTop);
+                        lastDisplay = now;
+                        totalTransactions += Interlocked.Exchange(ref _counter, 0);
+                    }
+                })
+            );
+
+            // Signals the beginning and the end of the test
+            tasks.Add(
+                Task.Run(async () =>
+                {
+                    await Task.Delay(TimeSpan.FromSeconds(time + Warmup));
+
+                    Interlocked.Exchange(ref _stopping, 1);
+                    stopTime = DateTime.UtcNow;
+                })
+            );
+
+            await Task.WhenAll(tasks);
+
+            var totalTps = (int) (totalTransactions / (stopTime - startTime).TotalSeconds);
+
+
+            listOfResults.Remove(listOfResults.Max());
+            listOfResults.Remove(listOfResults.Min());
+            var stddev = CalculateStdDev(listOfResults, listOfResults.Count);
+
+            Console.SetCursorPosition(0, Console.CursorTop);
+            Console.WriteLine($"{numThreads:D2} Threads, tps: {totalTps:F2}, stddev(w/o best+worst): {stddev:F2}");
+
+            var desc = $"{database}+{mode}+{numThreads}";
+
+            using (var sw = File.AppendText("results.md"))
+            {
+                sw.WriteLine($"|{desc}|{mode}|{numThreads:D2}|{totalTps:F0}|{stddev:F0}|");
+            }
+
+            using (var sw = File.AppendText("results.csv"))
+            {
+                sw.WriteLine($"{desc},{mode},{numThreads:D2},{totalTps:F0},{stddev:F0}");
+            }
+
+            double CalculateStdDev(IEnumerable<double> values, int count)
+            {
+                var avg = values.Sum() / count;
+                double sum = values.Sum(d => Math.Pow(d - avg, 2));
+                return Math.Sqrt((sum) / count);
+            }
+
+            async Task DoWorkAsync()
+            {
+                while (_stopping != 1)
+                {
+                    Interlocked.Increment(ref _counter);
+
+                    try
+                    {
+                        var results = new List<Fortune>();
+
+                        using (var connection = factory.CreateConnection())
+                        {
+                            connection.ConnectionString = connectionString;
+                            await connection.OpenAsync();
+
+                            using (var command = connection.CreateCommand())
+                            {
+                                command.CommandText = SqlQuery;
+                                command.Prepare();
+
+                                using (var reader = await command.ExecuteReaderAsync())
+                                {
+                                    while (await reader.ReadAsync())
+                                    {
+                                        results.Add(new Fortune
+                                        {
+                                            Id = reader.GetInt32(0),
+                                            Message = reader.GetString(1)
+                                        });
+                                    }
+                                }
+                            }
+                        }
+
+                        if (results.Count != 12)
+                        {
+                            throw new InvalidDataException("Not 12");
+                        }
+
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine(e.Message);
+                    }
+                }
+            }
+
+            async Task DoWorkAsyncReuseConnection()
+            {
+                using (var connection = factory.CreateConnection())
+                {
+                    using (var command = connection.CreateCommand())
+                    {
+                        connection.ConnectionString = connectionString;
+                        await connection.OpenAsync();
+
+                        command.CommandText = SqlQuery;
+                        command.Prepare();
+
+                        while (_stopping != 1)
+                        {
+                            Interlocked.Increment(ref _counter);
+
+                            try
+                            {
+                                var results = new List<Fortune>();
+
+                                using (var reader = await command.ExecuteReaderAsync())
+                                {
+                                    while (await reader.ReadAsync())
+                                    {
+                                        results.Add(new Fortune
+                                        {
+                                            Id = reader.GetInt32(0),
+                                            Message = reader.GetString(1)
+                                        });
+                                    }
+                                }
+
+                                if (results.Count != 12)
+                                {
+                                    throw new InvalidDataException("Not 12");
+                                }
+                            }
+                            catch (Exception e)
+                            {
+                                Console.WriteLine(e.Message);
+                            }
+                        }
+                    }
+                }
+            }
+
+            void DoWorkSync()
+            {
+                while (_stopping != 1)
+                {
+                    Interlocked.Increment(ref _counter);
+
+                    try
+                    {
+                        var results = new List<Fortune>();
+
+                        using (var connection = factory.CreateConnection())
+                        {
+                            connection.ConnectionString = connectionString;
+                            connection.Open();
+
+                            using (var command = connection.CreateCommand())
+                            {
+                                command.CommandText = SqlQuery;
+                                command.Prepare();
+
+                                using (var reader = command.ExecuteReader())
+                                {
+                                    while (reader.Read())
+                                    {
+                                        results.Add(new Fortune
+                                        {
+                                            Id = reader.GetInt32(0),
+                                            Message = reader.GetString(1)
+                                        });
+                                    }
+                                }
+                            }
+                        }
+
+                        if (results.Count != 12)
+                        {
+                            throw new InvalidDataException("Not 12");
+                        }
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine(e.Message);
+                    }
+                }
+            }
+
+            void DoWorkSyncReuseConnection()
+            {
+                using (var connection = factory.CreateConnection())
+                {
+                    using (var command = connection.CreateCommand())
+                    {
+                        connection.ConnectionString = connectionString;
+                        connection.Open();
+
+                        command.CommandText = SqlQuery;
+                        command.Prepare();
+
+                        while (_stopping != 1)
+                        {
+                            Interlocked.Increment(ref _counter);
+
+                            try
+                            {
+                                var results = new List<Fortune>();
+
+                                using (var reader = command.ExecuteReader())
+                                {
+                                    while (reader.Read())
+                                    {
+                                        results.Add(new Fortune
+                                        {
+                                            Id = reader.GetInt32(0),
+                                            Message = reader.GetString(1)
+                                        });
+                                    }
+                                }
+
+                                if (results.Count != 12)
+                                {
+                                    throw new InvalidDataException("Not 12");
+                                }
+                            }
+                            catch (Exception e)
+                            {
+                                Console.WriteLine(e.Message);
+                            }
+                        }
+                    }
+                }
+            }
+        }        
+    }
+}

src/DataAccessPerformance.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27108.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BenchmarkDb", "BenchmarkDb\BenchmarkDb.csproj", "{7FA56803-EFBD-4028-8067-33F9608E7821}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{7FA56803-EFBD-4028-8067-33F9608E7821}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7FA56803-EFBD-4028-8067-33F9608E7821}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7FA56803-EFBD-4028-8067-33F9608E7821}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7FA56803-EFBD-4028-8067-33F9608E7821}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {29C6A361-AEF7-4B3C-BD61-6225B47CBF91}
+	EndGlobalSection
+EndGlobal

src/NuGet.config

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+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="NuGet" value="https://api.nuget.org/v3/index.json" />
+    <add key="npgsql-unstable" value="https://www.myget.org/F/npgsql-unstable/api/v3/index.json" />
+  </packageSources>
+  <disabledPackageSources />
+</configuration>