Add benchmarks project

tests/Roslyn.Benchmarks/MSBuildWorkspaceBenchmarks.cs

@@ -0,0 +1,19 @@
+using System.Diagnostics;
+using BenchmarkDotNet.Attributes;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.MSBuild;
+
+namespace Roslyn.Benchmarks;
+
+public class MSBuildWorkspaceBenchmarks
+{
+	private const string _solutionFilePath = "C:/Users/Matthew/Documents/Git/StatusApp/StatusApp.sln";
+
+	[Benchmark]
+	public async Task<Solution> ParseSolutionFileFromPath()
+	{
+		var workspace = MSBuildWorkspace.Create();
+		var solution = await workspace.OpenSolutionAsync(_solutionFilePath);
+		return solution;
+	}
+}