内存快照，通过chrome开发者工具查看内存快照

node-heapdump.js

'use strict';

// kill -USR2 61365

const heapdump = require('heapdump');
const http = require('http');

const leakArray = [];
const leak = function () {
  leakArray.push('leak' + Math.random());
};

http.createServer(function (req, res) {
  leak();
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello World\n');
}).listen(1337);

console.log('Server running at http://127.0.0.1:1337/');
console.log(`This process is pid ${process.pid}`);