Update performance tests to .NET 8

[dzmitry-lahoda]

.NET 6 and 7 got huge performance boosts.

[dadhi]

I will update when the .NET 7 is released.
Though I did not hear of any Expression related performance work in it.
Maybe you know some?

[dzmitry-lahoda]

They improved .NET JIT afaik a lot in .NET 6 and 7, on top of 5, and BCL. Not expression specific.

Oh, found stuff while googling https://github.com/dotnet/runtime/tree/main/src/libraries/System.Linq.Expressions - they deprecated kind of expressions...

[dadhi]

deprecated kind of expressions...

Their reasoning is amazing, just means "we don't care". Good for me, then.

[dadhi]

Don't forget to add the Alloc Ratio column to the benchmarks and mention it in the readme.

[Giorgi]

Can you update it to .Net 8 once it's released?

[dadhi]

@Giorgi Yes, I will.

[dadhi]

BMs and readme are updated