Pasting: Fix performance regression due to removeWindowsFragments #41907
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mcsf
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[Feature] Raw Handling
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Size Change: +36 B (0%) Total Size: 1.25 MB
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ntsekouras
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Jun 23, 2022
ntsekouras
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Jun 23, 2022
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The failing Static Analysis checks should be resolved now - #41916. |
Fixes #41826. removeWindowsFragments was running two String#replace with regular expressions made computationally expensive due to the use of `.*` and the `s / dotAll` flag, resulting in severe performance degradations when handling larger strings of HTML. The solution is to manually trim the strings via a combination of String#indexOf and String#substring.
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Thanks! Rebased. |
Mamaduka
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Backport to WP Minor Release
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Thank you. TIL something important 🙇♂️ |
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Thanks for the fix! It might be worth commenting within the function that this is a hot path and can affect pasting performance for all, hence the importance of being extra lean in operations. |
adamziel
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Jun 30, 2022
…1907) * Pasting: Fix performance regression due to removeWindowsFragments Fixes #41826. removeWindowsFragments was running two String#replace with regular expressions made computationally expensive due to the use of `.*` and the `s / dotAll` flag, resulting in severe performance degradations when handling larger strings of HTML. The solution is to manually trim the strings via a combination of String#indexOf and String#substring. * removeWindowsFragments: bail early if no StartFragment found
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I just cherry-picked this PR to the wp/6.0 branch to get it included in the next release: ae46fef |
adamziel
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Backport to WP Minor Release
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Fixes #41826.
Alternative to #41881.
In RichText's
usePasteHandler,removeWindowsFragmentswas running twoString#replacewith regular expressions made computationally expensive due to the use of.*and thes / dotAllflag, resulting in severe performance degradations when handling larger strings of HTML.The solution is to manually trim the strings via a combination of
String#indexOfandString#substring.Testing Instructions
See parent issue, #41826, confirm that pasting is now reasonably fast (~ 1s) for the attached sample.