micro-optimize dynamic allocation alignment #17095
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| @@ -149,12 +149,24 @@ unsafe fn closure_exchange_malloc(drop_glue: fn(*mut u8), size: uint, | |||
| alloc as *mut u8 | |||
| } | |||
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| // The minimum alignment guaranteed by the architecture. This value is used to | |||
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"guaranteed by jemalloc on this architecture", or is it actually part of the architecture's ABI?
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It's part of the ABI and therefore jemalloc and other allocators have to provide it as the minimum. Since jemalloc has to be compatible with system allocators, I just took the numbers from there.
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Okay, cool. I was just wondering if this was an additional guarantee provided by jemalloc or not.
lnicola
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Add CONTRIBUTING.md I'm not great with these kinds of documents, but the main point I want to be able to raise is that feature implementations should have an issue raised first for discussion.
lnicola
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Add CONTRIBUTING.md I'm not great with these kinds of documents, but the main point I want to be able to raise is that feature implementations should have an issue raised first for discussion.
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Previously, some parts of this optimization were impossible because the
alignment passed to the free function was not correct. That was fully
fixed by #17012.
Closes #17092