perf: use C23's free_sized when available
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This only has an effect on systems with a default allocator where `free_sized` is faster than `free`. See https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2699.htm for an explanation of this feature. Co-authored-by: Eric Wieser <[email protected]>
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Mathlib CI status (docs):
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@eric-wieser Are you not using the small allocator? |
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Our hope was that https://github.com/google/tcmalloc might be just as good for our use case, but this would only be the case if tcmalloc actually gets access to the same size information that the small allocator has (through |
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@eric-wieser Thanks for the explanation. I assume you tested it successfully with a compiler supporting it :) ? |
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@Kha: yes, I tested this patch applied to lean v4.14.0 and it happy builds mathlib. |
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See https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2699.htm for an explanation of this feature.