On Sunday, 16 May 2021 at 08:04:06 UTC, cc wrote:
If the goal is to absolutely squeeze the GC back down after using new or dynamic arrays, I find destroy + GC.free often fails to do the trick (e.g. GC.stats.usedSize remains high).

destroy + GC.free has a quirk - GC.free only works on what GC.malloc returns, a base pointer, NOT what `new` returns. The documentation says this but it is a subtle detail easy to miss...

...including by other stdlib authors. __delete is simply incorrectly implemented and an accidental no-op in most cases!

https://issues.dlang.org/show_bug.cgi?id=21550

The documentation that describes how to migrate away from `delete` made this same error.

I tracked down the problem but wasn't 100% sure about the fix. Adding the GC.baseOf thing works for me but i didn't upstream since idk if it works for everyone else.

maybe i should just do it though.

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