Serializer benchmarks

[adamsitnik]

This PR adds the serializer benchmarks.

The idea is simple:

1. Project Definitions defines benchmarks and targets .NET Standard 2.0
2. Project Runner references Definitions and targets multiple frameworks (.NET 4.6.1, Core 2.0, Core 2.1) and allows to run them using BenchmarkDotNet

Todo (why it's WIP):

• console args support (sth like --coreclr Path --corefx Path)
• Readme

[jorive]

What is this file for?

[adamsitnik]

I wanted to benchmark the XmlSerializer with SGEN enabled to measure the gains. But the new SGEN tool fails to load some of the dependencies, so I needed to replace the problematic dependencies for the "SGEN" build configuration.

so it is something like

#if SGEN
using fake dependencies;
#else
using real dependencies;
#endif

See https://github.com/dotnet/corefx/issues/27281#issuecomment-367449130 for more

The problem is that it does not work yet, so maybe I should just remove it to keep it clean?

[jorive]

I think src/benchmarks/ should be src/serializer/ as we will be adding more benchmarks.

[adamsitnik]

I think src/benchmarks/ should be src/serializer/ as we will be adding more benchmarks.

I was not sure about how to name it and where to add it.

There is src\docker so I decided to create a new folder, for benchmarks only. This is how I ended up with src\benchmarks\Definitions\Serializers

[adamsitnik]

Maybe I should keep it in src\benchmarks\Serializers ?

[jorive]

Are we planning on using the same solution/project for all benchmarks?

[adamsitnik]

Yes, I was thinking about having a single project with benchmarks, then every benchmark "category" having it's own folder. Do you like this idea?

[jorive]

Yes, that could work.

[jorive]

LGTM

[jorive]

We should start thinking about CI integration tests.

[jorive]

LGTM

[adamsitnik]

@jorive I have added the docs (it took me more time than expected). Could you check my most recent commit?

[jorive]

You could use this:
BinaryFormatter version

[jorive]

Maybe same for the others?

[jorive]

@adamsitnik LGTM