[3.11] gh-98820: Fix quadratic time in csv.Sniffer for quoted fields (GH-154867) - #155538
Merged
pablogsal merged 1 commit intoAug 11, 2026
Merged
Conversation
Copy link
Copy Markdown
Member
Sorry, something went wrong.
…ields (pythonGH-154867) (cherry picked from commit b30c7fa) (cherry picked from commit 39dac55)
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Manual backport of #154867, cherry-picked from the 3.12 backport (#155166).
It applies unchanged: 3.11 supports possessive quantifiers.
Sniffing '"abcdefghijklmnopqrstuvwxyz"\n' * n with delimiters=',:|\t' is now linear: 0.142, 0.286 and 0.569 s for n = 2500, 5000 and 10000.