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ChuckandClaude Opus 5.5
82f3a3a3e4
* fix(redaction): make URL-userinfo redaction linear, not quadratic _REDACT_URL_USERINFO could start a match at every letter of a run of scheme characters, and each attempt read to the end of the run looking for `://`. On a long unbroken run of letters or digits (a hex digest, an ID, part of a response body) that is quadratic: 1.6s for 20k characters. The display service redacts every message, stack trace and context value it publishes in the error snapshot, holding the aggregator lock, and re.sub holds the GIL for the whole call, so one such exception stalled every thread, render loop included (~0.5s measured for 20k chars of hex). It also made test_snapshot_stays_small the slowest test in the suite by far: 142s of a 383s run, 139s of it in this one regex. A match may now only start where a run of scheme characters starts (negative lookbehind). Leading digits and `+.-` are captured in group 1 so the substitution restores them, and the scheme still has to start with a letter, so what gets redacted is unchanged: old and new output were identical on 300k fuzzed inputs. 20k chars now take ~0.5ms, 200k ~6ms, and test_snapshot_stays_small takes 0.8s. test/test_redaction.py pins the exact output for schemes that begin after digits or `+.-`, and bounds 50k-character runs at 1s; against the old pattern those timing tests fail at 3-11s each. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KMXdS2S4NXTJ8ET96GymhK * fix(redaction): make Authorization-header redaction linear too _REDACT_AUTH_HEADER matched the value's opening as `\s*["\']?\s*`: two `\s*` separated only by an optional quote. With no quote, a whitespace run could be split between them in every possible way, and when no credential followed (end of text, or `,` `"` `<` ...) the engine tried them all before giving up: quadratic, 8s for `authorization:` and 20k spaces, 17s with `Proxy-Authorization:` (tried again at the inner `authorization`). Same stall as the URL pattern: re.sub holds the GIL, and the display service redacts everything it publishes. The quote and the whitespace after it are now one optional unit, `\s*(?:["\']\s*)?`, which matches the same strings with only one way to split them. Output is identical to the old pattern on 300k fuzzed inputs; 20k spaces now take ~1.6ms. A scan of all three redaction patterns over prefix/run/suffix shapes finds none left that scales superlinearly. test/test_redaction.py pins exact output for quoted, tabbed, multi-line and credential-less headers, and bounds header + 20k whitespace at 1s; against the previous pattern those fail at 8-17s each. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KMXdS2S4NXTJ8ET96GymhK --------- Co-authored-by: Claude <noreply@anthropic.com>