Node.js Thread Pool test

README.md

UV_THREADPOOL=100 node index.js

ab -c 100 -n 1000

htop

index.js

const http = require('http');
const cluster = require('cluster');
const fs = require('fs');

if (cluster.isMaster) {
  for (let i = 0; i < 4; i++) {
    cluster.fork();
  }
} else {
  createServer();
}

function createServer() {
  const server = http.createServer((req, res) => {
    fs.readFile('photo.png', (err, data) => {
      if (err) {
        res.writeHead(500, {
          'Content-Type': 'text/plain',
        });
        res.end(`error ${err.toString()}`);
        return;
      }
      res.writeHead(200, {
        'Content-Type': 'image/png',
      });
      res.end(data);
    });
  });
  server.listen(8080);
}