gh-159037: Improve performance of str.join pre-pass · python/cpython@866211d

Triggered via pull request October 8, 2026 19:03

synchronize #159038

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Total duration 19s

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require-pr-label.yml

on: pull_request

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This PR is labelled type-feature. All features require approval from a core team member before merge. Found: type-feature, awaiting core review