Feedback [BurstCompile(OptimizeFor = ...)]

From the 2021.2.0a15 changelog:

• Burst: Added an OptimizeFor option to [BurstCompile], allowing users to say they want fast code, small code, or fastly compiled code.
• Burst: Assemblies are now allowed to have an [assembly: BurstCompile()] attribute to let users specify compile options that should apply assembly wide (for instance [assembly: BurstCompile(OptimizeFor = OptimizeFor.FastCompilation)]).

https://unity3d.com/unity/alpha/2021.2.0a15

Is this in some way bound to the build configuration (debug/release/master, editor)?

I'm asking because when I iterate in the editor or build a debug Player, I'd prefer

OptimizeFor.FastCompilation

. When I build a release/master Player, I'd prefer

OptimizeFor.Fast

.

How would I do this? Do you want us to #ifdef it?

Code (CSharp):

1. [BurstCompile(OptimizeFor =
2. #if DEVELOPMENT_BUILD || UNITY_EDITOR
3.   OptimizeFor.FastCompilation
4. #else
5.   OptimizeFor.Fast
6. #endif
7. )]

 

You'd probably use the assembly option for that. So your AssemblyInfo.cs would look like:

Code (csharp):

1.  
2. #if DEVELOPMENT_BUILD || UNITY_EDITOR
3. [assembly: BurstCompile(OptimizeFor.FastCompilation)]
4. #else
5. [assembly: BurstCompile(OptimizeFor.Fast)]
6. #endif
7.  

 

I don't really care about the compilation times with Burst at all, but I do care about this:

There totally should be a way to set the default for player (in Burst AOT Settings) and default for editor. You can't expect everyone to put extra boilerplate on code for every place where you use BurstCompile, that's just not cool at all.

 

Thank you for the response, it did ease my concerns Is there any estimate when we could expect the settings for these? eg. for 2021.2 or 2022+?

 

It might be more convenient to #if a const value:

Code (CSharp):

1. #if DEVELOPMENT_BUILD || UNITY_EDITOR
2.     public const OptimizeFor OptimizeForDevelopment = OptimizeFor.FastCompilation;
3. #else
4.     public const OptimizeFor OptimizeForDevelopment = OptimizeFor.Fast;
5. #endif

So you can then just use

Code (CSharp):

1. [BurstCompile(OptimizeFor = OptimizeForDevelopment)]

everywhere. Ultimately though, proper built-in support for player/editor defaults would be far superior.