Mono Upgrade Future plans for the Mono runtime upgrade

Unity 2018 Episode 3, iyswim

 

Now it released and it worked!

 

Has there been progression on new GC in ways that we could expect some experimental versions soon? Also if you use IL2CPP, I'm guessing we still get the old Boehm or does it use some other solution then under the hood?

 

A little bit offtopic, but anyway. If you are suffering from memory pressure on legacy GC, give a try to package Misnomer.Rist (Don't forget to download its dependency System.Buffers manually since Unity does not support NuGet packages and resolving their dependencies.) It is intended to be used instead of conventional List<T> like in ToList() call. Using ArrayPool<T>.Shared internally can significantly reduce allocations.

 

Thanks, but in that specific case I'd just use new NativeArrays (https://jacksondunstan.com/articles/4713).

My interest on more efficient GC isn't really for new code but for things that exist on other codebase that I'm already using (obviously ideal approach would be to fix all that manually). I do hope we'll get newer GC eventually as for outsider it seems like it's not been lately a huge priority to Unity and it's not been discussed that much anymore (before ECS and "performance by default", this topic seemed to have bigger importance in general).

Obviously the work Unity has done recently to reduce unneeded allocations on new systems is important but it doesn't carry to legacy code bases, hence wondering where GC upgrade is going atm.

 

We want to use IValueTaskSource in Unity, but from what I understand it's not available in Unity (only .net core 2.1).
Could this type (and all the related ones) be added to unity?
From what I understand supporting it wouldn't require any runtime or jit changes (unlike span).

 

I see, that is good news!
But it looks like Span<> will be part of net standard 2.1 as well, and in order to be actually useful that will require some runtime changes, is that something unity is going to do? Or will span be a special/slow case like in .net framework?