#cold-start

Benchmarking Bun's cold start against Node with performance.now()

const measureColdStart = (cmd: string[]) => {
  const start = performance.now();
  Bun.spawnSync(cmd);
  return performance.now() - start;
};

Bun.spawnSync plus performance.now() around each call turns a cold-start comparison against Node into a five-line, dependency-free benchmark.