Benchmark sanity check.

src/Microsoft.Performance.Toolkit.Engine.Tests/Microsoft.Performance.Toolkit.Engine.Tests.csproj

@@ -30,6 +30,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="BenchmarkDotNet" Version="0.13.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="2.1.1" />
@@ -37,6 +38,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Microsoft.Performance.SDK.Runtime.NetCoreApp\Microsoft.Performance.SDK.Runtime.NetCoreApp.csproj" />
+    <ProjectReference Include="..\Microsoft.Performance.SDK.Runtime.Tests\Microsoft.Performance.SDK.Runtime.Tests.csproj" />
     <ProjectReference Include="..\Microsoft.Performance.SDK.Runtime\Microsoft.Performance.SDK.Runtime.csproj" />
     <ProjectReference Include="..\Microsoft.Performance.SDK\Microsoft.Performance.SDK.csproj" />
     <ProjectReference Include="..\Microsoft.Performance.Testing.SDK\Microsoft.Performance.Testing.SDK.csproj" />

src/Microsoft.Performance.Toolkit.Engine.Tests/ProcessDataElementEfficiencyTest.cs

@@ -0,0 +1,57 @@
+using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Running;
+using System.Collections.Generic;
+
+/// <summary>
+///  Sanity Check Benchmark testing to see if IEnumerable is more efficient than using a list.
+///  <see cref="BaseSourceProcessingSession.ProcessDataElement(T, TContext, System.Threading.CancellationToken)"/>
+/// </summary>
+public class ProcessForLoopEfficiency
+{
+	private const int NumCookers = 1000;
+
+	private readonly List<int> _list;
+	private readonly IEnumerable<int> _enumerable;
+
+	public ProcessForLoopEfficiency()
+	{
+		_list = new List<int>();
+
+		for (int cooker = 0; cooker < NumCookers; cooker++)
+		{
+			// create a new ISourceDataCooker
+			//TestSourceDataCooker cooker = new TestSourceDataCooker();
+			_list.Add(cooker);
+		}
+
+		_enumerable = (IEnumerable<int>)_list;
+	}
+
+
+	[Benchmark]
+	public void EnumerableProcessDataCookers()
+	{
+		foreach (var cooker in _enumerable)
+		{
+			var newCooker = cooker;
+			var anotherCooker = newCooker;
+		}
+	}
+
+	[Benchmark]
+	public void ListProcessDataCookers()
+	{
+		for (int cookerIdx = 0; cookerIdx < _list.Count; cookerIdx++)
+		{
+			var sourceDataCooker = _list[cookerIdx];
+			var newCooker = sourceDataCooker;
+			var anotherCooker = newCooker;
+		}
+	}
+
+	static void Main(string[] args)
+	{
+		BenchmarkRunner.Run<ProcessForLoopEfficiency>();
+	}
+}
+