multi-core server manager for an express webserver performance

.js

const cluster = require('cluster')
const express = require('express')
// const compression = require('compression')
const os = require('os')


const app = express()
const port = 3000
const ncpus = os.cpus().length

// compression middleware for smaller responses and better performance
// app.use(
//   compression({
//     level: 6,
//     threshold: 10 * 10000,
//     filter: (req, res) => {
//       if (req.headers['x-no-compression']) return false;
    
//       return compression.filter(req, res);
//     }
//   })
// )

app.get('/', (req, res) => {
  res.send('Hello World!')
  cluster.worker.kill()
})


if (cluster.isMaster){
  for(i = 0; i < ncpus; i++){
    cluster.fork()
  }
  
  // handle worker events
  cluster.on('exit', (worker, code, signal) => {
    cluster.fork()
  })
  
} else {
  app.listen(port, () => console.log(`Process ${process.pid} running @ http://localhost:${port}`))
}


// app.listen(port, () => console.log(`App running @ http://localhost:${port}`))