src: replace custom ASCII validation with simdutf one#46271
src: replace custom ASCII validation with simdutf one#46271nodejs-github-bot merged 1 commit intonodejs:mainfrom
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I would have (naively) assumed that many compilers would vectorize contains_non_ascii_slow.
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@tniessen Me too! Fwiw, I’m not really trying to optimize anything here (who even uses |
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The commit title is missing the "d" from "simdutf". |
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| case ASCII: | ||
| if (contains_non_ascii(buf, buflen)) { | ||
| if (simdutf::validate_ascii_with_errors(buf, buflen).error) { |
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Any reason for using the error version? Is the common case to have invalid ASCII?
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The with_errors variant bails out early if it detects invalid ASCII, instead of running the entire string, so my thought was that it would match the performance profile of the previous code here best.
The common case is to not use this branch (ASCII) at all :)
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Complete aside: I have a distinct memory of writing this code, it looks like how I would write such code, yet git blame attributes it to Isaac S... huh. The human mind is a fickle thing.
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@bnoordhuis I double-checked out of interest (and also because it looks like code from you), and … you did! e325ace is all yours 🙂
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I feel vindicated now! Thanks for digging that up, Anna. :)
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Written almost ten years ago, and you still remember your code. I've nothing but respect for all of you.
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PR-URL: #46271 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Darshan Sen <raisinten@gmail.com>
PR-URL: #46271 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Darshan Sen <raisinten@gmail.com>
PR-URL: #46271 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Darshan Sen <raisinten@gmail.com>
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