Speed up String encoding on CPUs without SIMD hardware support#811
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radiospiel wants to merge 1 commit into
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Speed up String encoding on CPUs without SIMD hardware support#811radiospiel wants to merge 1 commit into
radiospiel wants to merge 1 commit into
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radiospiel
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sry, pushed the wrong branch :( |
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This PR tests for the presence of characters to be escaped using SIMD with non-hardware-supported instructions. We are testing 8 chars in one round, following a code excerpt from https://lemire.me/blog/2025/04/13/detect-control-characters-quotes-and-backslashes-efficiently-using-swar/
For strings that don't require escapes I have seen speedups of around 15% with this change.