Branchless Rust: Making a Filter 4x Faster by Removing an If

无分支Rust：通过移除If让过滤器速度快4倍

HN 225 分 · 69 条评论 · 作者 greyblake · 来源 www.greyblake.com · HN 讨论

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1L @anematode · 2026-08-06 12:03

Nice post!

You can do even a bit better if you're willing to use intrinsics. In particular this kind of operation is well-suited for compress-type operations, available as a first-class operation in at least AVX512, SVE and RVV; you can also emulate them reasonably quickly on NEON and AVX2.

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