Don't forget about branch prediction (GCC may have __builtin_expect, but that's ... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		tmtvl 6 days ago \| parent \| context \| favorite \| on: C isn't a programming language anymore (2022) Don't forget about branch prediction (GCC may have __builtin_expect, but that's not standard C).

direwolf20 6 days ago [–]

The compiler usually can't do anything about branch prediction. Expect is more about keeping cold paths out of the cache.

pjmlp 6 days ago | [–]

Actually that was one of the problems with EPIC architectures, where compilers are expected to be the ones doing those kind of optimizations.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact