Sometimes compilers fail us, in particular they often fail to correctly vectoriz... | Hacker News

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		frozenport on Nov 26, 2014 \| parent \| context \| favorite \| on: Say hello to x86_64 Assembly, Part 5 Sometimes compilers fail us, in particular they often fail to correctly vectorize code. If you do it manually insert the correct instructions you can get a 20% speedup!

vardump on Nov 26, 2014 [–]

Sometimes you get 40x speedup. Sometimes you gain nothing.

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