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perf(resolution): incremental receiver-inference scan memo + compiled-pattern memo — kong −8% more (−23% cumulative), byte-identical (#1392)

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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>
This commit is contained in:
Colby Mchenry
2026-07-21 00:20:03 -05:00
committed by GitHub
co-authored by Claude Fable 5
parent abb0a916f7
commit 974e6c8b95
3 changed files with 173 additions and 45 deletions
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src/resolution/index.ts
+7 -4
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@@ -16,7 +16,7 @@ import {
FrameworkResolver,
ImportMapping,
} from './types';
import { matchReference, matchFunctionRef, matchDottedCallChain, matchScopedCallChain, matchMethodCall, sameLanguageFamily, crossesKnownFamily, dumpNameMatcherProfile } from './name-matcher';
import { matchReference, matchFunctionRef, matchDottedCallChain, matchScopedCallChain, matchMethodCall, sameLanguageFamily, crossesKnownFamily, dumpNameMatcherProfile, clearNameMatcherMemos } from './name-matcher';
import { resolveViaImport, resolveJvmImport, extractImportMappings, extractReExports, loadCppIncludeDirs, isPhpIncludePathRef, isCobolCopybookRef, isNixPathImportRef, clearImportResolverMemos } from './import-resolver';
import { ResolverPool, minRefsForPool } from './resolver-pool';
import { detectFrameworks } from './frameworks';
@@ -373,9 +373,12 @@ export class ReferenceResolver {
this.knownNames = null;
this.knownFiles = null;
this.cachesWarmed = false;
// The import-resolver's per-context memos assume the same stable window
// as the caches above — drop them together.
if (this.context) clearImportResolverMemos(this.context);
// The import-resolver's and name-matcher's per-context memos assume the
// same stable window as the caches above — drop them together.
if (this.context) {
clearImportResolverMemos(this.context);
clearNameMatcherMemos(this.context);
}
}
/** `readFile` through the LRU content cache (null = read failed, also cached). */