TechEmpower.FrameworkBenchmarks/frameworks/JavaScript/fastify/app.js

const cluster = require("cluster");
const numCPUs = require("os").cpus().length;

if (cluster.isMaster) {
  // Fork workers.
  for (let i = 0; i < numCPUs; i++) {
    cluster.fork();
  }

  console.log("Master starting " + new Date().toISOString());

  cluster.on("exit", () => {
    process.exit(1);
  });
} else {
  // worker task
  require("./create-server");
}