Node.js Simple IPC Timmer Demo

master.js

const { fork } = require('child_process');
const crypto = require('crypto');

const timmer = fork('./timmer.js');

let lastTime = Date.now();
let localTime = Date.now();

timmer.on('message', (m) => {
  console.log('remote: ', m.time - lastTime - 1000 + 'ms');
  const now = Date.now();
  console.log('local:  ', now - localTime - 1000 + 'ms');
  lastTime = m.time;
  localTime = now;
});

function loop() {
  setTimeout(() => {
    loop()
    crypto.getDiffieHellman('modp14');
    crypto.getDiffieHellman('modp14');
  }, 1000);
}

loop();

singel.js

const crypto = require('crypto');

let lastTime = Date.now();

setInterval(() => {
  const now = Date.now()
  console.log(now - lastTime - 1000 + 'ms');
  lastTime = now;
  crypto.getDiffieHellman('modp14');
  crypto.getDiffieHellman('modp14');
}, 1000);

timmer.js

setInterval(() => {
  process.send({ time: Date.now() });
}, 1000);