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Colby Mchenry
974e6c8b95
The kong/tokio matcher-chain residue attributed (nm:mc-* sub-stage rows, shipped here too): matchMethodCall's cost is ~entirely inferLocalReceiverType — 61µs per miss on kong, 99% miss rate (39k `self:` calls hunting a local declaration Lua never writes), re-scanning the same scope lines for every ref. Two pure memos, both semantics-preserving by construction: - Compiled-pattern memo: localReceiverTypePatterns/phpPropertyTypePatterns built 2-4 fresh RegExp objects per call; patterns are a pure function of (language, receiver) and non-global, so instances are shared via a FIFO-capped map (no per-get mutation — the §7a.6 LRU-churn lesson). - Incremental scan memo: refs for the same (file, scope, receiver) arrive in ~ascending line order and the backward declaration scan is a pure function of immutable file lines — a per-context watermark scans each line once per key (query(c) = highest match in [start..c]; monotonic calls extend the watermark over (hi..c]; non-monotonic calls fall back to the plain bounded scan). componentScoped (CFML/PHP whole-file sweep) is keyed out. States drop with the context's file caches via clearNameMatcherMemos, wired into ReferenceResolver.clearCaches. kong mc-infer misses 61→20µs (2.4s→0.8s combined); fresh index 3.43 → 3.03-3.20s (−8%; 4.07 → 3.14 cumulative with #1391). tokio unchanged (tight scopes). Gates: dubbo (49k Java instance-method HITS ride this scan), kong, tokio, Fusion dumps all byte-identical; suite 2,689 ×2 with CODEGRAPH_KERNEL_EXPECT=1. Co-authored-by: Claude Fable 5 <noreply@anthropic.com>