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perf(javascript): reduce retained semantic analysis allocations (#1601)

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Reduce retained semantic allocations and memoize lexical scope ancestry while preserving semantic identities. Refs #1065 and #1563; the complete-directory memory failure remains open.
This commit is contained in:
Ysopwnable
2026-10-11 03:20:05 +08:00
committed by GitHub
parent f4e437e544
commit b28c0337fc
7 changed files with 125 additions and 44 deletions
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src/domain/javascript/javascriptSemanticAnalysis.ts
+5 -1
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@@ -444,6 +444,7 @@ function* collectDefinitionsSteps(
}[] = [];
yield* traverseJavaScriptAstSteps(program, {
enter: (node, parent, readAncestors) => {
if (parent !== null) state.parentsByNode.set(node, parent);
let parentScope = currentSemanticScope(stack);
if (
parent !== null &&
@@ -493,7 +494,10 @@ function* collectDefinitionsSteps(
});
}
const scope = currentSemanticScope(stack);
state.scopeByNode.set(node, scope);
// Other nodes inherit the nearest boundary through their AST parents.
// Avoid a second full-tree index for the same lexical relationship.
if (parent === null || openedScopes.has(node))
state.scopeByNode.set(node, scope);
collectSemanticCallable({
node,
parent,