Next time I get a 'memory leak' in Node.... (thanks to http://www.alexkras.com/simple-guide-to-finding-a-javascript-memory-leak-in-node-js/)

memoryleak.js

var heapdump = require('heapdump');

function generateHeapDumpAndStats(){
  //1. Force garbage collection every time this function is called
  try {
    global.gc();
  } catch (e) {
    console.log('You must run program with \'node --expose-gc index.js\'');
    process.exit();
  }

  //2. Output Heap stats
  var heapUsed = process.memoryUsage().heapUsed;
  console.log('Program is using ' + heapUsed + ' bytes of Heap.')

  //3. Get Heap dump
  process.kill(process.pid, 'SIGUSR2');
}

// setInterval(generateHeapDumpAndStats, 10000);