mirror of
https://github.com/abhigyanpatwari/GitNexus.git
synced 2026-10-03 02:21:44 +00:00
782 lines
30 KiB
TypeScript
782 lines
30 KiB
TypeScript
/**
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* Go ingestion pipeline benchmark.
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*
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* Generates synthetic Go codebases at increasing scales and measures
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* wall-clock time and peak heap through the full pipeline — parsing,
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* Go scope capture (emitGoScopeCaptures), package/import resolution, and
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* call resolution.
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*
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* Run: GITNEXUS_BENCH=1 npx vitest run test/integration/go-pipeline-benchmark.test.ts
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*
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* The first suite ("scales with file count") generates many small files —
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* each a struct plus getter/setter/compute methods, the DAO-style shape that
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* stresses the Go scope-capture path. Run under vitest it falls back to the
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* sequential path (no compiled worker), so it measures parse + scope-capture
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* scaling without the worker pool.
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*
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* The second suite ("worker pool — issue #1848") reproduces the actual bug:
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* it points the pool at the COMPILED `dist/.../parse-worker.js` (real
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* worker_threads), generates one ~400 KiB generated-DAO file plus padding so
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* the 15-file worker threshold trips, and runs with a short sub-batch idle
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* timeout. Under the buggy code the worker looks idle while inside
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* emitGoScopeCaptures and the file is quarantined; the fix emits progress so
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* the file survives. Requires a build first:
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*
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* (cd gitnexus && npm run build)
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* GITNEXUS_BENCH=1 npx vitest run test/integration/go-pipeline-benchmark.test.ts
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*
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* The worker suite auto-skips if the compiled worker is absent.
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*/
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import { describe, it, expect } from 'vitest';
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import fs from 'node:fs';
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import os from 'node:os';
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import path from 'node:path';
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import { fileURLToPath } from 'node:url';
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import type { ParsedFile, SymbolDefinition } from 'gitnexus-shared';
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import { runPipelineFromRepo } from '../../src/core/ingestion/pipeline.js';
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import {
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emitGoScopeCaptures,
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detectGoInterfaceImplementations,
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} from '../../src/core/ingestion/languages/go/index.js';
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const BENCH_ENABLED = process.env.GITNEXUS_BENCH === '1';
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const MODULE_PATH = 'example.com/go-bench';
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/**
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* The compiled worker the pool spawns. Under vitest, `import.meta.url`
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* resolves to `src/`, where no `.js` exists — so we point straight at the
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* `dist/` build, the same fallback parse-impl uses. `null` when unbuilt.
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*/
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const DIST_WORKER_URL = new URL(
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'../../dist/core/ingestion/workers/parse-worker.js',
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import.meta.url,
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);
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const DIST_WORKER_AVAILABLE = fs.existsSync(fileURLToPath(DIST_WORKER_URL));
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interface BenchResult {
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fileCount: number;
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structCount: number;
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packageCount: number;
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elapsedMs: number;
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peakHeapMB: number;
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nodeCount: number;
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edgeCount: number;
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}
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function generateGoFixture(
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fileCount: number,
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packageCount: number,
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): { dir: string; structCount: number; packageCount: number } {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), `go-bench-${fileCount}-`));
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fs.writeFileSync(path.join(dir, 'go.mod'), `module ${MODULE_PATH}\n\ngo 1.22\n`);
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const packages: string[] = [];
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for (let i = 0; i < packageCount; i++) {
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packages.push(`pkg${i}`);
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}
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const structCount = fileCount;
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const createdPackages = new Set<string>();
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for (let f = 0; f < fileCount; f++) {
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const pkg = packages[f % packages.length];
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const pkgDir = path.join(dir, pkg);
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if (!createdPackages.has(pkg)) {
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fs.mkdirSync(pkgDir, { recursive: true });
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createdPackages.add(pkg);
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}
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const structName = `Item${f}`;
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const siblingIdx = (f + 1) % fileCount;
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const siblingStruct = `Item${siblingIdx}`;
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const siblingPkg = packages[siblingIdx % packages.length];
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const crossIdx = (f + Math.floor(fileCount / 3)) % fileCount;
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const crossStruct = `Item${crossIdx}`;
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const crossPkg = packages[crossIdx % packages.length];
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// Only import packages we actually reference, and never our own.
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const imports = new Set<string>();
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if (siblingPkg !== pkg) imports.add(siblingPkg);
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if (crossPkg !== pkg) imports.add(crossPkg);
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const importBlock =
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imports.size > 0
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? ['import (', ...[...imports].map((p) => `\t"${MODULE_PATH}/${p}"`), ')', '']
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: [];
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const qualify = (otherPkg: string, name: string) =>
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otherPkg === pkg ? name : `${otherPkg}.${name}`;
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const siblingRef = qualify(siblingPkg, siblingStruct);
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const siblingCtor = qualify(siblingPkg, `New${siblingStruct}`);
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const crossRef = qualify(crossPkg, crossStruct);
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const crossCtor = qualify(crossPkg, `New${crossStruct}`);
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const content = [
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`package ${pkg}`,
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'',
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...importBlock,
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`type ${structName} struct {`,
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`\tID int64`,
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`\tName string`,
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`\tEmail string`,
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`\tValue float64`,
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`}`,
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'',
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`func New${structName}(id int64, name string) *${structName} {`,
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`\treturn &${structName}{ID: id, Name: name}`,
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`}`,
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'',
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`func (i *${structName}) GetID() int64 {`,
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`\treturn i.ID`,
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`}`,
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'',
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`func (i *${structName}) SetID(id int64) {`,
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`\ti.ID = id`,
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`}`,
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'',
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`func (i *${structName}) GetName() string {`,
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`\treturn i.Name`,
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`}`,
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'',
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`func (i *${structName}) SetValue(v float64) {`,
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`\ti.Value = v`,
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`}`,
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'',
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`func (i *${structName}) Compute() float64 {`,
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`\treturn i.Value * float64(i.ID)`,
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`}`,
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'',
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`func (i *${structName}) Process() *${siblingRef} {`,
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`\tsibling := ${siblingCtor}(i.ID, i.Name)`,
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`\tsibling.SetValue(i.Compute())`,
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`\treturn sibling`,
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`}`,
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'',
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`func (i *${structName}) CrossCall() *${crossRef} {`,
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`\tcross := ${crossCtor}(i.ID, i.Name)`,
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`\t_ = cross.GetID()`,
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`\treturn cross`,
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`}`,
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'',
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].join('\n');
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fs.writeFileSync(path.join(pkgDir, `item${f}.go`), content);
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}
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return { dir, structCount, packageCount: createdPackages.size };
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}
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async function runBenchmark(
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fileCount: number,
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packageCount: number,
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budgetMs: number,
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): Promise<BenchResult> {
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const {
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dir,
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structCount,
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packageCount: actualPackages,
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} = generateGoFixture(fileCount, packageCount);
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let peakHeapMB = 0;
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const heapSampler = setInterval(() => {
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const heap = process.memoryUsage().heapUsed / 1024 / 1024;
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if (heap > peakHeapMB) peakHeapMB = heap;
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}, 50);
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let timeoutHandle: ReturnType<typeof setTimeout> | undefined;
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try {
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const start = Date.now();
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const result = await Promise.race([
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runPipelineFromRepo(dir, () => {}, { skipGraphPhases: true }),
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new Promise<never>((_, reject) => {
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// Hold the handle so the winning (pipeline) path can cancel it in the
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// finally — otherwise the timer lingers for up to budgetMs and its
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// late rejection surfaces as an unhandled promise rejection.
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timeoutHandle = setTimeout(
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() => reject(new Error(`Pipeline exceeded ${budgetMs}ms at ${fileCount} files`)),
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budgetMs,
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);
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}),
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]);
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const elapsedMs = Date.now() - start;
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return {
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fileCount,
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structCount,
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packageCount: actualPackages,
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elapsedMs,
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peakHeapMB: Math.round(peakHeapMB),
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nodeCount: result.graph.nodeCount,
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edgeCount: result.graph.relationshipCount,
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};
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} finally {
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if (timeoutHandle !== undefined) clearTimeout(timeoutHandle);
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clearInterval(heapSampler);
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fs.rmSync(dir, { recursive: true, force: true });
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}
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}
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function printResults(label: string, results: BenchResult[]) {
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console.log(`\n${label}`);
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console.log('┌──────────┬─────────┬──────────┬───────────┬──────────┬───────┬───────┐');
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console.log('│ Files │ Structs │ Packages │ Time (ms) │ Heap MB │ Nodes │ Edges │');
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console.log('├──────────┼─────────┼──────────┼───────────┼──────────┼───────┼───────┤');
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for (const r of results) {
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console.log(
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`│ ${String(r.fileCount).padStart(8)} │ ${String(r.structCount).padStart(7)} │ ${String(r.packageCount).padStart(8)} │ ${String(r.elapsedMs).padStart(9)} │ ${String(r.peakHeapMB).padStart(8)} │ ${String(r.nodeCount).padStart(5)} │ ${String(r.edgeCount).padStart(5)} │`,
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);
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}
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console.log('└──────────┴─────────┴──────────┴───────────┴──────────┴───────┴───────┘');
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if (results.length >= 2) {
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console.log('\nScaling ratios (time_ratio / file_ratio):');
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for (let i = 1; i < results.length; i++) {
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const fileRatio = results[i].fileCount / results[i - 1].fileCount;
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const timeRatio = results[i].elapsedMs / results[i - 1].elapsedMs;
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const scaling = timeRatio / fileRatio;
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console.log(
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` ${results[i - 1].fileCount} → ${results[i].fileCount}: ${scaling.toFixed(2)}x (${scaling < 1.5 ? 'linear' : scaling < 3 ? 'superlinear' : 'WARNING: quadratic'})`,
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);
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}
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}
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}
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/**
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* Mirrors the issue #1848 reproduction fixture: one large generated-DAO Go
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* file (`package generated`, struct + 7 methods per entity) plus `padCount`
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* trivial files so parse-impl crosses the 15-file worker threshold and the
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* real worker pool engages.
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*/
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function generateGoQuarantineFixture(
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entityCount: number,
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padCount: number,
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): { dir: string; bigFileBytes: number; fileCount: number } {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), `go-bench-1848-${entityCount}-`));
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const lines = [
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'package generated',
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'',
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'// Code generated for GitNexus issue #1848 repro. DO NOT EDIT.',
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'',
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];
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for (let i = 0; i < entityCount; i++) {
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const n = String(i).padStart(4, '0');
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lines.push(`type DefUserDao${n} struct {`);
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lines.push('\tid int64');
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lines.push('\tname string');
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lines.push('\temail string');
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lines.push('\tcreatedAt int64');
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lines.push('}', '');
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lines.push(`func (d *DefUserDao${n}) GetID() int64 { return d.id }`);
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lines.push(`func (d *DefUserDao${n}) SetID(id int64) { d.id = id }`);
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lines.push(`func (d *DefUserDao${n}) GetName() string { return d.name }`);
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lines.push(`func (d *DefUserDao${n}) SetName(name string) { d.name = name }`);
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lines.push(`func (d *DefUserDao${n}) GetEmail() string { return d.email }`);
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lines.push(`func (d *DefUserDao${n}) SetEmail(email string) { d.email = email }`);
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lines.push(`func (d *DefUserDao${n}) Validate() error { return nil }`);
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lines.push('');
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}
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const bigContent = lines.join('\n');
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fs.writeFileSync(path.join(dir, 'zz_generated.def_userdao.go'), bigContent);
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for (let i = 0; i < padCount; i++) {
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const idx = String(i).padStart(2, '0');
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fs.writeFileSync(
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path.join(dir, `pad_${idx}.go`),
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`package pad${i}\n\nfunc Ping${i}() int { return ${i} }\n`,
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);
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}
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return {
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dir,
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bigFileBytes: Buffer.byteLength(bigContent),
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fileCount: 1 + padCount,
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};
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}
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describe.skipIf(!BENCH_ENABLED)('Go pipeline benchmark', () => {
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it('scales with file count (workers enabled)', async () => {
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const scales = [100, 250, 500];
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const results: BenchResult[] = [];
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for (const fileCount of scales) {
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const packageCount = Math.max(4, Math.ceil(Math.sqrt(fileCount)));
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const result = await runBenchmark(fileCount, packageCount, 180_000);
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results.push(result);
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console.log(
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` ${fileCount} files: ${result.elapsedMs}ms, ${result.peakHeapMB}MB heap, ${result.nodeCount} nodes, ${result.edgeCount} edges`,
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);
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}
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printResults('Go Pipeline — Workers Enabled', results);
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for (let i = 1; i < results.length; i++) {
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const fileRatio = results[i].fileCount / results[i - 1].fileCount;
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const timeRatio = results[i].elapsedMs / results[i - 1].elapsedMs;
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// The scale steps are 2.5x (100->250) and 2x (250->500). A quadratic
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// regression makes timeRatio ~= fileRatio^2, i.e. timeRatio/fileRatio ~=
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// fileRatio (2.5 and 2.0) — which a `< 3` bound would wave through. The
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// O(n) path keeps this ratio ~1 (measured 0.44 and 0.75 post-fix), so a
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// `< 1.5` bound (the printResults "linear" boundary) actually fails on a
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// re-regression to O(n^2) while leaving comfortable headroom for linear.
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expect(timeRatio / fileRatio).toBeLessThan(1.5);
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}
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}, 300_000);
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});
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describe.skipIf(!BENCH_ENABLED || !DIST_WORKER_AVAILABLE)(
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'Go pipeline benchmark — worker pool (issue #1848)',
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() => {
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if (BENCH_ENABLED && !DIST_WORKER_AVAILABLE) {
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// Surfaced once when the bench is requested but the worker is unbuilt.
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console.warn(
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`\n[go-bench] Skipping worker-pool suite: compiled worker not found at\n ${fileURLToPath(DIST_WORKER_URL)}\n Build first: (cd gitnexus && npm run build)\n`,
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);
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}
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// Tunables mirror run-analyze-repro.sh. 800 entities ≈ 406 KiB — under the
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// 512 KiB GITNEXUS_MAX_FILE_SIZE ceiling so the file is parsed, not skipped.
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const entityCount = Number(process.env.REPRO_GO_ENTITIES ?? 800);
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// 30 s reproduces on the report author's machine; raising it (e.g. 120000)
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// is the documented workaround. Kept overridable so the same test can both
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// reproduce the bug and confirm the fix.
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const subBatchTimeoutMs = Number(process.env.GITNEXUS_WORKER_SUB_BATCH_TIMEOUT_MS ?? 30_000);
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it('does not quarantine the large generated Go file on sub-batch idle timeout', async () => {
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const { dir, bigFileBytes, fileCount } = generateGoQuarantineFixture(entityCount, 14);
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// Sub-batch knobs that force fine chunking onto the worker (env-only —
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// there is no PipelineOptions field for these two). Capture the prior
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// values before the try; set them as the first statements INSIDE it so
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// the finally's restore covers every path that mutated the process env.
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const prevMaxBytes = process.env.GITNEXUS_WORKER_SUB_BATCH_MAX_BYTES;
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const prevTimeout = process.env.GITNEXUS_WORKER_SUB_BATCH_TIMEOUT_MS;
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let peakHeapMB = 0;
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const heapSampler = setInterval(() => {
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const heap = process.memoryUsage().heapUsed / 1024 / 1024;
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if (heap > peakHeapMB) peakHeapMB = heap;
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}, 50);
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try {
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process.env.GITNEXUS_WORKER_SUB_BATCH_MAX_BYTES = '262144';
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process.env.GITNEXUS_WORKER_SUB_BATCH_TIMEOUT_MS = String(subBatchTimeoutMs);
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const start = Date.now();
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const result = await runPipelineFromRepo(dir, () => {}, {
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skipGraphPhases: true,
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// Real worker_threads against the compiled worker — the surface the
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// bug actually lives on.
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workerUrlForTest: DIST_WORKER_URL,
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// Match the repro's chunking so the byte budget mirrors the issue.
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chunkByteBudget: 262144,
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parseChunkConcurrency: 1,
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});
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const elapsedMs = Date.now() - start;
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// The big file alone emits ≥ entityCount*5 nodes (1 struct + 7 methods
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// each). If the worker is quarantined on the idle timeout, those
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// vanish — so this threshold is the regression guard.
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const survivalFloor = entityCount * 5;
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const survived = result.graph.nodeCount >= survivalFloor;
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console.log(
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`\nGo Pipeline — Worker Pool (issue #1848)` +
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`\n files: ${fileCount} (1 big @ ${Math.round(bigFileBytes / 1024)} KiB + 14 pad)` +
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`\n entities: ${entityCount}, sub-batch idle timeout: ${subBatchTimeoutMs}ms` +
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`\n elapsed: ${elapsedMs}ms, peak heap: ${Math.round(peakHeapMB)}MB` +
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`\n usedWorkerPool: ${result.usedWorkerPool}` +
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`\n nodes: ${result.graph.nodeCount} (survival floor ${survivalFloor}) → ${survived ? 'SURVIVED' : 'QUARANTINED (bug reproduced)'}`,
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);
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// Sanity: the worker path must have actually engaged, else the test
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// proves nothing about the worker bug.
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expect(result.usedWorkerPool).toBe(true);
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// The fix: the generated file is fully parsed despite the idle timeout.
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expect(result.graph.nodeCount).toBeGreaterThanOrEqual(survivalFloor);
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} finally {
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clearInterval(heapSampler);
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if (prevMaxBytes === undefined) delete process.env.GITNEXUS_WORKER_SUB_BATCH_MAX_BYTES;
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else process.env.GITNEXUS_WORKER_SUB_BATCH_MAX_BYTES = prevMaxBytes;
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if (prevTimeout === undefined) delete process.env.GITNEXUS_WORKER_SUB_BATCH_TIMEOUT_MS;
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else process.env.GITNEXUS_WORKER_SUB_BATCH_TIMEOUT_MS = prevTimeout;
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fs.rmSync(dir, { recursive: true, force: true });
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}
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}, 360_000);
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},
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);
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/**
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* Unlike the two suites above, this one is NOT gated behind GITNEXUS_BENCH and
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* needs no compiled worker — so it runs in normal CI and is the actual guard
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* against an O(n^2) re-regression of emitGoScopeCaptures (issue #1848). It calls
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* the hotpath directly on a ~400-struct generated source. The O(n) path does
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* this in a few hundred ms; the old findNodeAtRange-from-root behaviour took
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* ~25s+ at this size. The budget is a coarse tripwire (huge margin over the
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* fixed path, far below a quadratic regression), not a microbenchmark — keep it
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* generous so it never flakes on a loaded CI runner.
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*/
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describe('Go scope-capture O(n^2) regression tripwire', () => {
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function generateGoStructSource(structCount: number): string {
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const lines = ['package generated', ''];
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for (let i = 0; i < structCount; i++) {
|
||
const n = String(i).padStart(4, '0');
|
||
lines.push(
|
||
`type Item${n} struct {`,
|
||
'\tid int64',
|
||
'\tname string',
|
||
'}',
|
||
'',
|
||
`func (d *Item${n}) GetID() int64 { return d.id }`,
|
||
`func (d *Item${n}) SetID(id int64) { d.id = id }`,
|
||
`func (d *Item${n}) GetName() string { return d.name }`,
|
||
`func (d *Item${n}) Validate() error { return nil }`,
|
||
'',
|
||
);
|
||
}
|
||
return lines.join('\n');
|
||
}
|
||
|
||
it('parses a 400-struct file in well under the O(n^2) tripwire budget', () => {
|
||
const STRUCT_COUNT = 400;
|
||
const BUDGET_MS = 5_000; // coarse: ~20x the fixed path (~250ms), trips a ~20x regression; a quadratic regression at 400 structs is ~25s
|
||
const src = generateGoStructSource(STRUCT_COUNT);
|
||
|
||
emitGoScopeCaptures(src, 'tripwire-warmup.go'); // warm up the parser/query JIT
|
||
|
||
const start = Date.now();
|
||
const matches = emitGoScopeCaptures(src, 'tripwire.go');
|
||
const elapsedMs = Date.now() - start;
|
||
|
||
// Sanity: the captures are actually produced (each struct + 4 methods emits
|
||
// far more than 10 capture groups), so a fast-but-empty result can't pass.
|
||
expect(matches.length).toBeGreaterThan(STRUCT_COUNT * 10);
|
||
// The actual regression guard: a re-regression to O(n^2) blows this budget.
|
||
expect(elapsedMs).toBeLessThan(BUDGET_MS);
|
||
}, 30_000);
|
||
});
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Go structural interface detection benchmarks
|
||
// ---------------------------------------------------------------------------
|
||
|
||
/**
|
||
* Build synthetic ParsedFile data for detectGoInterfaceImplementations.
|
||
*
|
||
* Creates `interfaceCount` interfaces (each with Find + Save methods) and
|
||
* `structCount` structs that implement all of them (matching signatures).
|
||
* Also generates a few BadStruct entries with mismatched signatures to
|
||
* verify they are correctly excluded (non-vacuous guard).
|
||
*/
|
||
function generateSyntheticInterfaceData(interfaceCount: number, structCount: number): ParsedFile[] {
|
||
const defs: SymbolDefinition[] = [];
|
||
const ifaceIds: string[] = [];
|
||
const structIds: string[] = [];
|
||
|
||
// Interfaces
|
||
for (let i = 0; i < interfaceCount; i++) {
|
||
const ifaceId = `iface:Repo${i}`;
|
||
ifaceIds.push(ifaceId);
|
||
defs.push({
|
||
nodeId: ifaceId,
|
||
filePath: 'repo.go',
|
||
type: 'Interface',
|
||
qualifiedName: `Repo${i}`,
|
||
});
|
||
// Find(id string) User
|
||
defs.push({
|
||
nodeId: `iface:Repo${i}.Find`,
|
||
filePath: 'repo.go',
|
||
type: 'Method',
|
||
qualifiedName: `Repo${i}.Find`,
|
||
ownerId: ifaceId,
|
||
parameterCount: 1,
|
||
requiredParameterCount: 1,
|
||
parameterTypes: ['string'],
|
||
returnType: 'User',
|
||
});
|
||
// Save(user User) error
|
||
defs.push({
|
||
nodeId: `iface:Repo${i}.Save`,
|
||
filePath: 'repo.go',
|
||
type: 'Method',
|
||
qualifiedName: `Repo${i}.Save`,
|
||
ownerId: ifaceId,
|
||
parameterCount: 1,
|
||
requiredParameterCount: 1,
|
||
parameterTypes: ['User'],
|
||
returnType: 'error',
|
||
});
|
||
}
|
||
|
||
// Structs — each implements all interfaces
|
||
for (let s = 0; s < structCount; s++) {
|
||
const structId = `struct:Impl${s}`;
|
||
structIds.push(structId);
|
||
defs.push({
|
||
nodeId: structId,
|
||
filePath: 'repo.go',
|
||
type: 'Struct',
|
||
qualifiedName: `Impl${s}`,
|
||
});
|
||
for (let i = 0; i < interfaceCount; i++) {
|
||
defs.push({
|
||
nodeId: `struct:Impl${s}.Repo${i}.Find`,
|
||
filePath: 'repo.go',
|
||
type: 'Method',
|
||
qualifiedName: `Impl${s}.Find`,
|
||
ownerId: structId,
|
||
parameterCount: 1,
|
||
requiredParameterCount: 1,
|
||
parameterTypes: ['string'],
|
||
returnType: 'User',
|
||
});
|
||
defs.push({
|
||
nodeId: `struct:Impl${s}.Repo${i}.Save`,
|
||
filePath: 'repo.go',
|
||
type: 'Method',
|
||
qualifiedName: `Impl${s}.Save`,
|
||
ownerId: structId,
|
||
parameterCount: 1,
|
||
requiredParameterCount: 1,
|
||
parameterTypes: ['User'],
|
||
returnType: 'error',
|
||
});
|
||
}
|
||
}
|
||
|
||
// BadStructs — wrong Save signature (string instead of User), should NOT match
|
||
for (let b = 0; b < Math.min(5, structCount); b++) {
|
||
const badId = `struct:Bad${b}`;
|
||
defs.push({
|
||
nodeId: badId,
|
||
filePath: 'repo.go',
|
||
type: 'Struct',
|
||
qualifiedName: `Bad${b}`,
|
||
});
|
||
for (let i = 0; i < interfaceCount; i++) {
|
||
defs.push({
|
||
nodeId: `struct:Bad${b}.Repo${i}.Find`,
|
||
filePath: 'repo.go',
|
||
type: 'Method',
|
||
qualifiedName: `Bad${b}.Find`,
|
||
ownerId: badId,
|
||
parameterCount: 1,
|
||
requiredParameterCount: 1,
|
||
parameterTypes: ['string'],
|
||
returnType: 'User',
|
||
});
|
||
// Mismatched Save: string param instead of User
|
||
defs.push({
|
||
nodeId: `struct:Bad${b}.Repo${i}.Save`,
|
||
filePath: 'repo.go',
|
||
type: 'Method',
|
||
qualifiedName: `Bad${b}.Save`,
|
||
ownerId: badId,
|
||
parameterCount: 1,
|
||
requiredParameterCount: 1,
|
||
parameterTypes: ['string'],
|
||
returnType: 'error',
|
||
});
|
||
}
|
||
}
|
||
|
||
return [
|
||
{
|
||
filePath: 'repo.go',
|
||
language: 'go',
|
||
scopes: [],
|
||
imports: [],
|
||
parsedImports: [],
|
||
localDefs: defs,
|
||
referenceSites: [],
|
||
},
|
||
] as ParsedFile[];
|
||
}
|
||
|
||
/**
|
||
* Ungated tripwire: runs in normal CI. Calls detectGoInterfaceImplementations
|
||
* directly on synthetic data to catch O(n²) regressions. The current indexed
|
||
* path (structIdsByMethodName intersection) keeps this well under budget.
|
||
*/
|
||
describe('Go structural interface detection O(n²) regression tripwire', () => {
|
||
it('detects implementations for 100 interfaces × 100 structs within budget', () => {
|
||
const IFACE_COUNT = 100;
|
||
const STRUCT_COUNT = 100;
|
||
const BUDGET_MS = 5_000;
|
||
|
||
const parsed = generateSyntheticInterfaceData(IFACE_COUNT, STRUCT_COUNT);
|
||
const emptyIndexes = {} as any;
|
||
const emptyModel = {} as any;
|
||
|
||
// Warm up
|
||
detectGoInterfaceImplementations(
|
||
generateSyntheticInterfaceData(5, 5),
|
||
emptyIndexes,
|
||
emptyModel,
|
||
);
|
||
|
||
const start = Date.now();
|
||
const result = detectGoInterfaceImplementations(parsed, emptyIndexes, emptyModel);
|
||
const elapsedMs = Date.now() - start;
|
||
|
||
// Sanity: each interface should be implemented by all STRUCT_COUNT structs
|
||
expect(result.implementations.size).toBe(IFACE_COUNT);
|
||
for (const [, impls] of result.implementations) {
|
||
expect(impls).toHaveLength(STRUCT_COUNT);
|
||
}
|
||
// Regression guard
|
||
expect(elapsedMs).toBeLessThan(BUDGET_MS);
|
||
|
||
console.log(
|
||
` interface-detection tripwire: ${IFACE_COUNT}×${STRUCT_COUNT} = ${IFACE_COUNT * STRUCT_COUNT} pairs, ${elapsedMs}ms`,
|
||
);
|
||
}, 30_000);
|
||
});
|
||
|
||
/**
|
||
* Gated scaling benchmark: measures how detectGoInterfaceImplementations
|
||
* scales as interface and struct counts grow proportionally.
|
||
*
|
||
* Run: GITNEXUS_BENCH=1 npx vitest run test/integration/go-pipeline-benchmark.test.ts
|
||
*/
|
||
describe.skipIf(!BENCH_ENABLED)('Go structural interface detection benchmark', () => {
|
||
const scales = [50, 200, 800];
|
||
const REPS = 3;
|
||
|
||
it('scales linearly with interface × struct count', () => {
|
||
interface ScaleResult {
|
||
ifaceCount: number;
|
||
structCount: number;
|
||
totalPairs: number;
|
||
elapsedMs: number;
|
||
implEdges: number;
|
||
}
|
||
|
||
const results: ScaleResult[] = [];
|
||
const emptyIndexes = {} as any;
|
||
const emptyModel = {} as any;
|
||
|
||
for (const n of scales) {
|
||
// Warm up with small data once
|
||
detectGoInterfaceImplementations(
|
||
generateSyntheticInterfaceData(5, 5),
|
||
emptyIndexes,
|
||
emptyModel,
|
||
);
|
||
|
||
let bestMs = Infinity;
|
||
let implEdges = 0;
|
||
const parsed = generateSyntheticInterfaceData(n, n);
|
||
|
||
for (let r = 0; r < REPS; r++) {
|
||
const start = Date.now();
|
||
const result = detectGoInterfaceImplementations(parsed, emptyIndexes, emptyModel);
|
||
const elapsed = Date.now() - start;
|
||
if (elapsed < bestMs) {
|
||
bestMs = elapsed;
|
||
implEdges = 0;
|
||
for (const [, impls] of result.implementations) implEdges += impls.length;
|
||
}
|
||
}
|
||
|
||
results.push({
|
||
ifaceCount: n,
|
||
structCount: n,
|
||
totalPairs: n * n,
|
||
elapsedMs: bestMs,
|
||
implEdges,
|
||
});
|
||
console.log(` ${n}×${n} = ${n * n} pairs: ${bestMs}ms (${implEdges} IMPLEMENTS edges)`);
|
||
}
|
||
|
||
// Print scaling table
|
||
console.log('\nGo Interface Detection — Scaling');
|
||
console.log('┌──────────┬──────────┬───────────┬───────────┐');
|
||
console.log('│ Iface×St │ Pairs │ Time (ms) │ IMPL edges│');
|
||
console.log('├──────────┼──────────┼───────────┼───────────┤');
|
||
for (const r of results) {
|
||
console.log(
|
||
`│ ${String(`${r.ifaceCount}×${r.structCount}`).padStart(8)} │ ${String(r.totalPairs).padStart(8)} │ ${String(r.elapsedMs).padStart(9)} │ ${String(r.implEdges).padStart(9)} │`,
|
||
);
|
||
}
|
||
console.log('└──────────┴──────────┴───────────┴───────────┘');
|
||
|
||
// Assert linear scaling
|
||
if (results.length >= 2) {
|
||
console.log('\nScaling ratios (time_ratio / size_ratio):');
|
||
for (let i = 1; i < results.length; i++) {
|
||
const sizeRatio = results[i].totalPairs / results[i - 1].totalPairs;
|
||
const timeRatio = results[i].elapsedMs / results[i - 1].elapsedMs;
|
||
const scaling = timeRatio / sizeRatio;
|
||
console.log(
|
||
` ${results[i - 1].totalPairs} → ${results[i].totalPairs}: ${scaling.toFixed(2)}x (${scaling < 1.5 ? 'linear' : scaling < 3 ? 'superlinear' : 'WARNING: quadratic'})`,
|
||
);
|
||
expect(scaling).toBeLessThan(1.5);
|
||
}
|
||
}
|
||
}, 300_000);
|
||
});
|
||
|
||
/**
|
||
* Gated split-phase benchmark: measures index-building and detection-loop
|
||
* time separately to identify which phase is the bottleneck.
|
||
*
|
||
* Run: GITNEXUS_BENCH=1 npx vitest run test/integration/go-pipeline-benchmark.test.ts -t "split-phase"
|
||
*/
|
||
describe.skipIf(!BENCH_ENABLED)('Go structural interface detection split-phase benchmark', () => {
|
||
const scales = [50, 100, 200, 400];
|
||
const REPS = 3;
|
||
|
||
it('separates index-build and detection time', () => {
|
||
const emptyIndexes = {} as any;
|
||
const emptyModel = {} as any;
|
||
|
||
// Warm up
|
||
detectGoInterfaceImplementations(
|
||
generateSyntheticInterfaceData(5, 5),
|
||
emptyIndexes,
|
||
emptyModel,
|
||
);
|
||
|
||
console.log('\nGo Interface Detection — Split-Phase Timing');
|
||
console.log('┌──────────┬──────────┬──────────┬──────────┬──────────┬──────────┐');
|
||
console.log('│ Size │ Pairs │ Total ms │ Detect │ Defs │ IMPL │');
|
||
console.log('├──────────┼──────────┼──────────┼──────────┼──────────┼──────────┼──────────┤');
|
||
|
||
for (const n of scales) {
|
||
const parsed = generateSyntheticInterfaceData(n, n);
|
||
const totalDefs = parsed.reduce((sum, f) => sum + f.localDefs.length, 0);
|
||
|
||
let bestTotal = Infinity;
|
||
let bestImplEdges = 0;
|
||
|
||
for (let r = 0; r < REPS; r++) {
|
||
const start = Date.now();
|
||
const result = detectGoInterfaceImplementations(parsed, emptyIndexes, emptyModel);
|
||
const elapsed = Date.now() - start;
|
||
|
||
if (elapsed < bestTotal) {
|
||
bestTotal = elapsed;
|
||
bestImplEdges = 0;
|
||
for (const [, impls] of result.implementations) bestImplEdges += impls.length;
|
||
}
|
||
}
|
||
|
||
console.log(
|
||
`│ ${String(`${n}×${n}`).padStart(8)} │ ${String(n * n).padStart(8)} │ ${String(bestTotal).padStart(8)} │ ${String('—').padStart(8)} │ ${String(totalDefs).padStart(8)} │ ${String(bestImplEdges).padStart(8)} │`,
|
||
);
|
||
}
|
||
console.log('└──────────┴──────────┴──────────┴──────────┴──────────┴──────────┘');
|
||
|
||
// Compute and print scaling ratios
|
||
console.log('\nScaling analysis (total time ratio / pair-count ratio):');
|
||
// We can't split phases without exporting internals, but we can report
|
||
// how total time scales relative to pair count.
|
||
// The detection loop is O(I×C×M×O_a) where O_a grows with I in this
|
||
// synthetic case, so pair-count ratio alone underestimates expected growth.
|
||
}, 300_000);
|
||
});
|