Good question, I unfortunately don't have a link to give you, or fine details, b... | Hacker News

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		glandium on Aug 25, 2023 \| parent \| context \| favorite \| on: How to speed up the Rust compiler Good question, I unfortunately don't have a link to give you, or fine details, but GCC does hot/cold partitioning and applies different optimization level to hot and cold code blocks. IIRC, it uses the level given on the command line for hot code, and -Os for cold code.

vlovich123 on Aug 25, 2023 [–]

I see nothing in the documentation to suggest that. The only thing I’m aware compilers do for hot/cold is partitioning to improve locality.

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