GeezerVison is showing github.com — [3.14] gh-98820: Fix quadratic time in csv.Sniffer for quoted fields (GH-154867) by miss-islington · Pull Request #155117 · python/cpython
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miss-islington
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Aug 3, 2026
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edited by bedevere-app
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The regular expressions which look for a quoted field matched its body
lazily, so a closing quote which was not followed by a delimiter was
retried with every following quote, to the end of the sample. Match
the body possessively instead: it ends at the first quote which is not
doubled, as it does for a reader.
(cherry picked from commit 476fb09)
Co-authored-by: Serhiy Storchaka [email protected]
Co-authored-by: Claude Opus 5 (1M context) [email protected]
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…ields (pythonGH-154867)
The regular expressions which look for a quoted field matched its body
lazily, so a closing quote which was not followed by a delimiter was
retried with every following quote, to the end of the sample. Match
the body possessively instead: it ends at the first quote which is not
doubled, as it does for a reader.
(cherry picked from commit 476fb09)
Co-authored-by: Serhiy Storchaka <[email protected]>
Co-authored-by: Claude Opus 5 (1M context) <[email protected]>
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deadlovelll
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Aug 5, 2026
…ields (pythonGH-154867) (pythonGH-155117)
The regular expressions which look for a quoted field matched its body
lazily, so a closing quote which was not followed by a delimiter was
retried with every following quote, to the end of the sample. Match
the body possessively instead: it ends at the first quote which is not
doubled, as it does for a reader.
(cherry picked from commit 476fb09)
Co-authored-by: Serhiy Storchaka <[email protected]>
Co-authored-by: Claude Opus 5 (1M context) <[email protected]>
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