Enable server garbage collection for ILSpy and ilspycmd

[wwh1004]

Enabling server garbage collection can let ILSpy decompile large project 3x~4x and small project 2x~3x faster than before.
It is easy to enable it:

<configuration>
  <runtime>
    <gcServer enabled="true" />
  </runtime>
</configuration>

[wwh1004]

Decompile mscorlib in my computer:

no server gc:
Decompilation complete in 16.2 seconds.
server gc:
Decompilation complete in 6.4 seconds.

Decompile default assembly list (mscorlib, System, System.Core, System.Xml, System.Xaml, WindowsBase, PresentationCore, PresentationFramework) as solution in my computer:

no server gc:
Elapsed time: 80.3 seconds.
server gc:
Elapsed time: 21.5 seconds.

[dgrunwald]

Thanks for the hint!

My run times with ILSpy (master c95da67):
mscorlib without server gc: Decompilation complete in 12,2 seconds.
mscorlib with server gc: Decompilation complete in 5,8 seconds.
default assembly list without server gc: Elapsed time: 58,1 seconds.
default assembly list with server gc: Elapsed time: 29,4 seconds.

[dgrunwald]

I'm not quite sure how this applies to ilspycmd, given that that is using .NET Core.

[siegfriedpammer]

https://stackoverflow.com/questions/52525205/setting-gcserver-true-when-running-on-linux-in-net-core-project