debug: which IN path fires for nsfwLevel (temporary)#199
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Traces show nsfwLevel IN takes 900ms with 41-bit accumulator — the complement path should make this instant. Adding diagnostic logging to determine whether complement or original path fires, and why. Temporary — remove after diagnosis. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
JustMaier
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nsfwLevel has 12 loaded values (6 real + stale), not 6. IN [1,2,4,8,16] = 5 keys, complement = 7 keys. Old condition (7 < 5) failed, falling through to the O(5 × acc_size) union path = 900ms at 100M. New condition: compare total complement CARDINALITY vs accumulator size. The 7 complement bitmaps have maybe ~5M total bits. Subtracting 5M bits from a 100M acc is O(5M) — microseconds. The old union path does 5× AND+OR on 100M bits = O(500M) — seconds. Condition: use complement when complement_cardinality < acc/2 OR complement_cardinality < 10M (absolute threshold for always-cheap). Also removes temporary debug eprintln from PR #199. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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JustMaier
added a commit
that referenced
this pull request
Apr 13, 2026
nsfwLevel has 12 loaded values (6 real + stale), not 6. IN [1,2,4,8,16] = 5 keys, complement = 7 keys. Old condition (7 < 5) failed, falling through to the O(5 × acc_size) union path = 900ms at 100M. New condition: compare total complement CARDINALITY vs accumulator size. The 7 complement bitmaps have maybe ~5M total bits. Subtracting 5M bits from a 100M acc is O(5M) — microseconds. The old union path does 5× AND+OR on 100M bits = O(500M) — seconds. Condition: use complement when complement_cardinality < acc/2 OR complement_cardinality < 10M (absolute threshold for always-cheap). Also removes temporary debug eprintln from PR #199. Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Temporary diagnostic — traces show nsfwLevel IN takes 900ms with 41-bit accumulator. The complement optimization should make this instant. This adds eprintln logging to see whether complement or original path fires, and the key values (loaded_count, complement_keys, in_keys).
Remove after diagnosis.
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