Function main

benchmark/v8/startup-snapshot-callbacks.js:35–58

({ n, count })

}

function main({ n, count }) {
  const dir = mkdtempSync(path.join(tmpdir(), 'node-bench-snapshot-'));
  const snapshotBlob = path.join(dir, 'snapshot.blob');
  const fixtureScript = path.join(dir, 'build.js');

  try {
    buildSnapshot(snapshotBlob, fixtureScript, count);

    const warmup = 3;
    let finished = -warmup;

    while (finished < n) {
      const child = spawnSync(process.execPath, ['--snapshot-blob', snapshotBlob]);
      if (child.status !== 0) {
        throw new Error(`Snapshot run failed:\n${child.stderr}`);
      }
      finished++;
      if (finished === 0) bench.start();
      if (finished === n) bench.end(n);
    }
  } finally {
    rmSync(dir, { recursive: true, force: true });
  }
}