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+--- Thread: Suggestion / Idea Per-Frame GC Allocation in Burst Solver (/thread-3251.html)
Per-Frame GC Allocation in Burst Solver - pdinklag - 28-12-2021
While profiling, I hit on a pretty obvious per-frame GC allocations in the Burst Solver: the padding array in BurstSolverImpl.ApplyConstraints.
The allocation can be avoided by using a stack-allocated span, the number of enum entries is small enough:
Code:
Span<int> padding = stackalloc int[Oni.ConstraintTypeCount];However, I'm not sure since when exactly Unity supports C# 7.2, so for older versions, a statically allocated array might be due.
RE: Per-Frame GC Allocation in Burst Solver - josemendez - 10-01-2022
(28-12-2021, 10:39 AM)pdinklag Wrote: While profiling, I hit on a pretty obvious per-frame GC allocations in the Burst Solver: the padding array in BurstSolverImpl.ApplyConstraints.
The allocation can be avoided by using a stack-allocated span, the number of enum entries is small enough:
Code:Span<int> padding = stackalloc int[Oni.ConstraintTypeCount];
However, I'm not sure since when exactly Unity supports C# 7.2, so for older versions, a statically allocated array might be due.
Thanks for the feedback!
Not sure about C# version support in older (read: < 2020) Unity versions, so will investigate and apply this to the production branch if it all looks clear
.