Function nextDevWorkflow

scripts/devlow-bench.mjs:227–548

(benchmarkName, benchDir, pages)

const nextDevWorkflow =
  (benchmarkName, benchDir, pages) =>
  async ({ turbopack, page }) => {
    const pageConfig =
      typeof pages[page] === 'string' ? { url: pages[page] } : pages[page]
    const cleanupTasks = []
    try {
      const benchmarkDir = resolve(REPO_ROOT, 'bench', benchDir)

      // cleanup .next directory to remove filesystem cache
      await retry(() =>
        rm(join(benchmarkDir, '.next'), { recursive: true, force: true })
      )

      await measureTime('cleanup', {
        scenario: benchmarkName,
        props: { turbopack, page },
      })

      // startup browser
      let session = await newBrowserSession({})
      const closeSession = async () => {
        if (session) {
          await session.close()
          session = null
        }
      }
      cleanupTasks.push(closeSession)
      await measureTime('browser startup', {
        props: { turbopack, page },
      })

      const env = {
        PATH: process.env.PATH,
        NODE: process.env.NODE,
        HOSTNAME: process.env.HOSTNAME,
        PWD: process.env.PWD,
        // Disable otel initialization to prevent pending / hanging request to otel collector
        OTEL_SDK_DISABLED: 'true',
        NEXT_PUBLIC_OTEL_SENTRY: 'true',
        NEXT_PUBLIC_OTEL_DEV_DISABLED: 'true',
        NEXT_TRACE_UPLOAD_DISABLED: 'true',
        // Enable next.js test mode to get HMR events and silence canary only
        __NEXT_TEST_MODE: '1',
      }

      const serverEnv = {
        ...env,
        PORT: '0',
      }

      // run command to start dev server
      const args = [turbopack ? 'dev-turbopack' : 'dev-webpack']
      let shell = command('pnpm', args, {
        cwd: benchmarkDir,
        env: serverEnv,
      })
      const killShell = async () => {
        if (shell) {