b6b6e960cfPR-URL: https://github.com/nodejs/node/pull/62914 Reviewed-By: Stephen Belanger <admin@stephenbelanger.com> Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br> Reviewed-By: Ilyas Shabi <ilyasshabi94@gmail.com> Reviewed-By: Gürgün Dayıoğlu <hey@gurgun.day> Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
58 lines
1.7 KiB
JavaScript
58 lines
1.7 KiB
JavaScript
'use strict';
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// Benchmarks startup time when deserialize callbacks are registered in a
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// startup snapshot, measuring real binary execution with --snapshot-blob.
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const common = require('../common.js');
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const { spawnSync } = require('child_process');
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const { mkdtempSync, writeFileSync, rmSync } = require('fs');
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const { tmpdir } = require('os');
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const path = require('path');
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const bench = common.createBenchmark(main, {
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count: [10, 100, 1000, 10000],
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n: [30],
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});
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function buildSnapshot(snapshotBlob, fixtureScript, count) {
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writeFileSync(fixtureScript, `
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'use strict';
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const v8 = require('node:v8');
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for (let i = 0; i < ${count}; i++) {
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v8.startupSnapshot.addDeserializeCallback(() => {});
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}
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v8.startupSnapshot.setDeserializeMainFunction(() => {});
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`);
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const result = spawnSync(process.execPath, [
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'--snapshot-blob', snapshotBlob,
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'--build-snapshot', fixtureScript,
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]);
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if (result.status !== 0) {
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throw new Error(`Failed to build snapshot:\n${result.stderr}`);
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}
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}
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function main({ n, count }) {
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const dir = mkdtempSync(path.join(tmpdir(), 'node-bench-snapshot-'));
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const snapshotBlob = path.join(dir, 'snapshot.blob');
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const fixtureScript = path.join(dir, 'build.js');
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try {
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buildSnapshot(snapshotBlob, fixtureScript, count);
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const warmup = 3;
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let finished = -warmup;
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while (finished < n) {
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const child = spawnSync(process.execPath, ['--snapshot-blob', snapshotBlob]);
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if (child.status !== 0) {
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throw new Error(`Snapshot run failed:\n${child.stderr}`);
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}
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finished++;
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if (finished === 0) bench.start();
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if (finished === n) bench.end(n);
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}
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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}
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