Regarding the per-thread scratch arena system, can you have an additional per-thread int scratchCount that increases every time you call GetScratch and decreases every time you call ReleaseScratch? Then every time you need a new scratch arena, rather than searching, you can get it from the index after the int. This will also give the maximum number of unique scratches you need in any instance.
Regarding the per-thread scratch arena system, can you have an additional per-thread int scratchCount that increases every time you call GetScratch and decreases every time you call ReleaseScratch? Then every time you need a new scratch arena, rather than searching, you can get it from the index after the int. This will also give the maximum number of unique scratches you need in any instance.