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Kpa-clawbot
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## Summary Fixes critical performance issue in neighbor graph computation that consumed 65% of CPU (30+ seconds) on a 325K packet dataset. ## Changes ### Fix 1: Cache strings.ToLower results - Added cachedToLower() helper that caches lowercased strings in a local map - Pubkeys repeat across hundreds of thousands of observations - Pre-computes fromLower once per transaction instead of once per observation - **Impact:** Eliminates ~8.4s (25.3% CPU) ### Fix 2: Cache parsed DecodedJSON via StoreTx.ParsedDecoded() - Added ParsedDecoded() method on StoreTx using sync.Once for thread-safe lazy caching - json.Unmarshal on decoded_json now runs at most once per packet lifetime - Result reused by extractFromNode, indexByNode, trackAdvertPubkey - **Impact:** Eliminates ~8.8s (26.3% CPU) ### Fix 3: Extend neighbor graph TTL from 60s to 5 minutes - The graph depends on traffic patterns, not individual packets - Reduces rebuild frequency 5x - **Impact:** ~80% reduction in sustained CPU from graph rebuilds ## Tests - 7 new tests added, all 26+ existing neighbor graph tests pass - BenchmarkBuildFromStore: 727us/op, 237KB/op, 6030 allocs/op Related: #559 --------- Co-authored-by: Kpa-clawbot <259247574+Kpa-clawbot@users.noreply.github.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: you <you@example.com>