Unity's plan to migrate from Mono to .NET CoreCLR

https://blog.unity.com/technology/unity-and-net-whats-next

by binarynate • 4 years ago

47 12 4 years ago

blog.unity.com

fomine32• 4 years ago

Would Unity's work like AOT stuff come to .NET world?

metaltyphoon• 4 years ago

Why though? Microsoft is already working on full AOT for .NET 7

fomine32• 4 years ago

It's happy if MS AOT finally come instead of Unity one.

jelling• 4 years ago

Hopefully they also take time to upgrade their archaic forum software. Even a basic search is a terrible experience. For a company fighting for developer mindshare, it’s surprisingly bad.

aaaaaaaaata• 4 years ago

Unity devs aren't on forums.

They're on Discord, Matrix, IRC.

Mountain_Skies• 4 years ago

Getting there is going to take us several years.

It's understandable that it's going to take a long time but nevertheless disappointing.

animal531• 4 years ago

Pretty much this. Add in that in a relatively small project in which you include a few asset store items along with your own code the code build time might be 15s, followed by 15s to launch the editor into play mode; now they're talking about some improvements that might shave a few ms off the time, or a multi-year project (which might actually make a difference); but which probably will be implemented as poorly as everything else they've done.

In another year they'll be bored of this performance upgrade, and they'll start something else up.

On some of their other attempts: IL2CPP has performance improvements, but it also has issues such as on a select % of laptops it'll just cause a random crashes (even in a very basic project). They tried adding DOTS for graphical improvement rendering a lot of items, but then just sort of semi-abandoned it to work on other tasks.

Let's not even get started on them splitting the rendering pipelines.

exebook• 4 years ago

Didn't know Unity relies on a garbage collected language. How do they deal with the mark and sweep pauses?

pjmlp2• 4 years ago

Just like Unreal does, many seem unaware that Blueprints and the C++ dialect used by it also make use of a GC.

How does Unity coupe with pauses?

In two ways, by using a somewhat modern GC, mark and sweep is like "introduction to tracing GC" 101 CS. So pauses are somewhat minimal.

.NET also supports value types and explicit memory management, if one wants to go down that route.

Which they do, with their C# subset for high performance code named Burst.

Maybe you know Mike Acton of Data Oriented fame, he is one of the lead architects at this infrastructure.

toivo• 4 years ago

Nowadays, they do have option to use incremental garbage collector which in theory alleviates frame spikes.

lwansbrough• 4 years ago

Wow I don’t envy the team tasked with making this happen.

It’s been a long time coming. It’s unfortunate to learn there isn’t more progress towards this end already. I was looking for news from Unity about a migration as soon as Microsoft announced .NET 5 as the successor to both .NET Core and .NET Framework.

Nevertheless, better late than never. Here’s hoping they don’t run into too much internal resistance, as I’m sure they will be stepping on the toes of literally every other team at Unity until they get this done.

Unity's plan to migrate from Mono to .NET CoreCLR

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