next.js/bench/next-minimal-server/bin/minimal-server.js

#!/usr/bin/env node
process.env.NODE_ENV = 'production'

require('../../../test/lib/react-channel-require-hook')

console.time('next-cold-start')
const NextServer = require('next/dist/server/next-server').default
const path = require('path')

const appDir = process.cwd()
const distDir = '.next'

const compiledConfig = require(
  path.join(appDir, distDir, 'required-server-files.json')
).config

process.chdir(appDir)

const nextServer = new NextServer({
  conf: compiledConfig,
  dir: appDir,
  distDir,
  minimalMode: true,
  customServer: false,
})

const requestHandler = nextServer.getRequestHandler()

const port = parseInt(process.env.PORT, 10) || 3000

const server = require('http').createServer((req, res) => {
  return requestHandler(req, res)
})

server.listen(port, () => {
  console.timeEnd('next-cold-start')
  console.log('Listening on port ' + port)
})

let shuttingDown = false
function shutdown() {
  if (shuttingDown) return
  shuttingDown = true

  // Allow Node to exit cleanly so --cpu-prof/--heap-prof outputs are flushed.
  server.close(() => {
    process.exit(0)
  })

  // Fallback in case active keep-alive connections prevent close callback.
  setTimeout(() => {
    process.exit(1)
  }, 5000).unref()
}

process.on('SIGTERM', shutdown)
process.on('SIGINT', shutdown)