Function runBenchmark

tooling/scripts/perf-runtime-repeat.mjs:235–275

(targetName, runIndex, warmTempRoot)

}

function runBenchmark(targetName, runIndex, warmTempRoot) {
  const script = targetName === 'web' ? 'perf:web-runtime' : 'perf:desktop-runtime'
  const env = { ...process.env }
  if (runIndex > 0) {
    if (targetName === 'web') env.ZEN_PERF_SKIP_WEB_BUILD = '1'
    else env.ZEN_PERF_SKIP_DESKTOP_BUILD = '1'
  }
  if (warmTempRoot) {
    const prefix = targetEnvPrefix(targetName)
    env[`ZEN_PERF_${prefix}_TEMP_ROOT`] = warmTempRoot
    if (runIndex > 0) env[`ZEN_PERF_${prefix}_SKIP_SEED`] = '1'
  }

  return new Promise((resolve, reject) => {
    const child = spawn(npmCommand, ['run', script], {
      env,
      shell: process.platform === 'win32',
      stdio: ['ignore', 'pipe', 'pipe']
    })
    let output = ''

    child.stdout.on('data', (chunk) => {
      const text = String(chunk)
      output += text
      process.stdout.write(text)
    })
    child.stderr.on('data', (chunk) => {
      const text = String(chunk)
      output += text
      process.stderr.write(text)
    })
    child.on('error', reject)
    child.on('close', (code) => {
      if (code === 0) {
        resolve(parseMetrics(output, metricNames[targetName]))
        return
      }
      reject(new Error(`${script} run ${runIndex + 1} exited with code ${code ?? 'unknown'}`))
    })
  })
}

function printSummary(targetName, samples) {
  const names = metricNames[targetName]