Node.js Memory leark

mem_leak.js

'use strict';
 const Memwatch = require('memwatch-next');
 const Util = require('util');
 
 if (Config.env === 'production') {
   /**
    * Check for memory leaks
     */
    let hd = null;
    Memwatch.on('leak', (info) => {
      console.log('memwatch::leak');
      console.error(info);
      if (!hd) {
        hd = new Memwatch.HeapDiff();
     }
     else {
       const diff = hd.end();
       console.error(Util.inspect(diff, true, null));
       trace.report('memwatch::leak', {
         HeapDiff: hd
       });
       hd = null;
     }
    });
  
    Memwatch.on('stats', (stats) => {
      console.log('memwatch::stats');
      console.error(Util.inspect(stats, true, null));
      trace.report('memwatch::stats', {
        Stats: stats
     });
   });
 }