Perf tests for https://github.com/dotnet/corefx/issues/157

Install the latest daily build of the .NET Core SDK from here.

• I don't use the native installer, and instead use the .zip/.tar.gz and extract it to some location on disk, say D:\dotnet. You can easily delete the location when done.

Add the above dotnet executable to your PATH.

$ dotnet restore RefOverloadsPerfTests.csproj

• This is necessary to download the Microsoft.NETCore.App NuGet package you will need.

In order to use the new ref overloads on the System.Numerics types, you need to patch your installation with the proposed changes.

1. git checkout https://github.com/eerhardt/corefx/tree/RefOverloads
2. build -release
3. Copy the built corefx/bin/AnyOS.AnyCPU.Release/System.Numerics.Vectors/netcoreapp/System.Numerics.Vectors.dll to WHERE_YOU_INSTALLED_DOTNET/shared/Microsoft.NETCore.App/2.1.0-preview1-version/
4. Copy the built corefx/bin/ref/System.Numerics.Vectors/4.1.4.0/netcoreapp/System.Numerics.Vectors.dll to NUGET_PACKAGES_ROOT/packages/microsoft.netcore.app/2.1.0-preview1-version/ref/netcoreapp2.1/.

• NUGET_PACKAGES_ROOT is typically C:\Users\USER\.nuget\ on Windows or ~/.nuget/ on non-Windows.
• Ensure you are using the same 2.1.0-preview1-version for steps 3 and 4.

$ dotnet run -c Release

to run the perf tests.