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Ran 23 Mar 2026 09:12AM UTC

Files 321

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Committed 23 Mar 2026 09:11AM UTC coverage: 95.749% (+0.002%) from 95.747%

Job # 3138.1

Build Type

push

github

Committed by

bobzhang

Commit Message

perf(string): delay StringBuilder allocation in Regex::replace_by

replace_by was always creating a StringBuilder and materializing a
new string, even when the regex didn't match anything. For large
input strings with no matches, this turned a cheap check into an
O(n) copy.

Fix: delay buffer creation until the first match is found. When
there are no matches, return the original string view directly
without any allocation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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