perf: skip rewriting files untouched by in-place anonymization#22
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armand0e merged 1 commit intoJul 10, 2026
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In-place anonymization always replaced the destination with the temp file even when no line changed, rewriting every clean trace and churning mtimes. Track whether any line was actually modified and drop the temp file when an in-place run left the content identical; apply the same check to whole-text (non-jsonl) files. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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In-place anonymization (
teich extract's default post-pass,teich anonymize --in-place) always replaced the destination with the freshly written temp file, even when zero lines changed — every clean trace got rewritten and its mtime churned on every run.This tracks whether any line was actually modified while streaming; when an in-place run leaves the content identical, the temp file is discarded instead of replacing the destination. Whole-text (non-jsonl) files get the same check. Copy-to-other-destination behavior is unchanged.
Testing
pytest tests/test_extract_anonymize_cli.py— 32 passed🤖 Generated with Claude Code