gh-153030: Fix quadratic complexity in incremental parsing in HTMLParser - #153031
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serhiy-storchaka merged 2 commits intoJul 4, 2026
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- Issue: Another worst case quadratic complexity in HTMLParser #153030
…TMLParser When an unterminated construct (e.g. a tag or comment) spanned many feed() calls, rescanning the growing buffer and concatenating new data onto it were both quadratic. New data is now accumulated in a list and only joined and parsed once enough has piled up. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
serhiy-storchaka
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needs backport to 3.10
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
gpshead
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Jul 4, 2026
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Thanks @serhiy-storchaka for the PR 🌮🎉.. I'm working now to backport this PR to: 3.10, 3.11, 3.12, 3.13, 3.14, 3.15. |
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GH-153038 is a backport of this pull request to the 3.15 branch. |
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needs backport to 3.15
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GH-153039 is a backport of this pull request to the 3.14 branch. |
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GH-153040 is a backport of this pull request to the 3.13 branch. |
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Sorry, @serhiy-storchaka, I could not cleanly backport this to |
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GH-153041 is a backport of this pull request to the 3.12 branch. |
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Sorry, @serhiy-storchaka, I could not cleanly backport this to |
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GH-153043 is a backport of this pull request to the 3.10 branch. |
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…HTMLParser (GH-153031) (GH-153040) When an unterminated construct (e.g. a tag or comment) spanned many feed() calls, rescanning the growing buffer and concatenating new data onto it were both quadratic. New data is now accumulated in a list and only joined and parsed once enough has piled up. (cherry picked from commit bcf98dd) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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…HTMLParser (GH-153031) (GH-153039) When an unterminated construct (e.g. a tag or comment) spanned many feed() calls, rescanning the growing buffer and concatenating new data onto it were both quadratic. New data is now accumulated in a list and only joined and parsed once enough has piled up. (cherry picked from commit bcf98dd) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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…HTMLParser (GH-153031) (GH-153038) When an unterminated construct (e.g. a tag or comment) spanned many feed() calls, rescanning the growing buffer and concatenating new data onto it were both quadratic. New data is now accumulated in a list and only joined and parsed once enough has piled up. (cherry picked from commit bcf98dd) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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…ng in HTMLParser (pythonGH-153031) (pythonGH-153039) When an unterminated construct (e.g. a tag or comment) spanned many feed() calls, rescanning the growing buffer and concatenating new data onto it were both quadratic. New data is now accumulated in a list and only joined and parsed once enough has piled up. (cherry picked from commit bcf98dd) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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…ing in HTMLParser (pythonGH-153031) (pythonGH-153039) When an unterminated construct (e.g. a tag or comment) spanned many feed() calls, rescanning the growing buffer and concatenating new data onto it were both quadratic. New data is now accumulated in a list and only joined and parsed once enough has piled up. (cherry picked from commit bcf98dd) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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pythongh-153030: Fix quadratic complexity in incremental parsing in HTMLParser (pythonGH-153031) (pythonGH-153039) When an unterminated construct (e.g. a tag or comment) spanned many feed() calls, rescanning the growing buffer and concatenating new data onto it were both quadratic. New data is now accumulated in a list and only joined and parsed once enough has piled up. (cherry picked from commit bcf98dd) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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Jul 30, 2026
…ng in HTMLParser (pythonGH-153031) When an unterminated construct (e.g. a tag or comment) spanned many feed() calls, rescanning the growing buffer and concatenating new data onto it were both quadratic. New data is now accumulated in a list and only joined and parsed once enough has piled up. (cherry picked from commit bcf98dd) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This was referenced Aug 3, 2026
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