Benchmark tool

flush-time.js

var map = {};
var list = [];

function timeStart(label) {
	if (!map[label]) {
		list.push(label);
		map[label] = {
			time: 0
		};
	}
	map[label].start = process.hrtime();
}

function timeEnd(label) {
	if (map[label]) {
		map[label].time += toMilliseconds(process.hrtime(map[label].start));
	}
}

function flushTime(log) {
	if (!log) {
		log = defaultLog
	}

	list.forEach(function (label) {
		if ('time' in map[label]) {
			log(label, map[label].time);
		}
	});

	map = {};
	list = [];
}

function toMilliseconds(time) {
	return time[0] * 1e+3 + Math.floor(time[1] * 1e-6);
}

function defaultLog(label, time) {
	console.log('%dms: %s', time, label);
}

exports.timeStart = timeStart;

exports.timeEnd = timeEnd;

exports.flushTime = flushTime;