node-binary/node-chainsaw memory leak demo

leakdemo.js

var profiler = require('v8-profiler');
var Binary = require('binary');
var EventEmitter = require('events').EventEmitter;

var em = new EventEmitter;

var CHAIN_LENGTH = 5000;

var benchmarkTimer;

Binary.stream(em)
    .loop(function (end) {
        var vars_ = this.vars;
        this
            .scan('filler', 'BEGINMSG')
            .buffer('cmd', 3)
            .word8('num')
            .tap(function (vars) {
                if (vars.cmd.toString('ascii') == 'end') end();
            })
        ;
    })
    .tap(function (vars) {
		var duration = (new Date).getTime() - benchmarkTimer;
		var memory = process.memoryUsage();

		//profiler.stopProfiling('genChain');
		profiler.takeSnapshot('finalHeap');

		console.log("Downloaded "+CHAIN_LENGTH+" blocks in " + duration + "ms");
		console.log("Memory usage: "+memory.vsize);
		debugger;
    })
;

process.nextTick(function () {
	benchmarkTimer = (new Date).getTime();
	for (var i = 0; i < CHAIN_LENGTH; i++) {
		em.emit('data', new Buffer("BEGINMSGcmd\x01" +
								   "GARBAGEDATAXXXX" +
								   "BEGINMSGcmd\x02" +
								   "BEGINMSGcmd\x03", 'ascii'));
	}
	em.emit('data', new Buffer("BEGINMSGend\x03", 'ascii'));
});