Op 9-11-2024 om 14:59 schreef Hairy Pixels via fpc-pascal:
The solution would be to be to use a different allocator but because
FPC only allows overriding NewInstance per class it would be mean you
would need a mutex anyway to control which allocator was used
depending on the thread.
Maybe a threadvar could be used to get the allocator for the class
type? I haven’t tried but I know there’s a penalty to use that too and
it may wipe out of the gains again. I’m not sure what a threadvar is
though or how it’s implemented just that the docs say it could be slow.
Any ideas would be appreciated.
Afaik the FPC heapmanager's design is to avoid that lock too frequently
and have a small per thread heap. This can get frustrated when you do a
lot of allocating in one thread, and releasing into another.
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