perf-timers

node-perf-timers

High performance but limited replacement for setTimeout().

It's about 5-20 times faster and requires 20 times less memory for handling timers (not including callback copies);

Compared to setTimeout() there are some drawbacks that make it limited for using:

• It does not support domains.
• It does not have clearTimeout() analog. Just make it have no efect and let it fire. Check examples/let_it_fire.js.
• It does not support argument passing: setTimeout(function(a, b, c) { ... }, 1000, 'a', 'b', 'c');. Though consider handler technique shown below in a usage section.
• Under no heavy load it tends to execute tasks later than setTimeout would. Though under heavy load when setTimeout starts dropping behind, and perf-timers behave more in time. Check perf/setTimeout-delay.js vs. perf/perf-timers-delay.js
• It does not guarantee order of execution.

Installation

npm install perf-timers

Usage

var PerfTimers = require('..');
var timer = new PerfTimers();
var now = Date.now();
timer.setTimeout(function() {
  console.log('Delay', Date.now() - now);
}, 1000);

Delay: 1088

Improved usage:

var PerfTimers = require('..');
var handler = function(ids) {
    console.log(ids);
};
var timer = new PerfTimers(handler, 1);
for (var i = 0; i < 10; i ++) {
    timer.setTimeout('x' + i, 10);
}

[ 'x0', 'x1', 'x2', 'x3', 'x4', 'x5', 'x6', 'x7', 'x8', 'x9' ]

If you want to use more precise timers on short distances, use shorter interval new PerfTimers(1); If you need timers running for hours it would be better to use longer interval (yes, timer accuracy will be minutewise): new PerfTimers(60 * 1000); A rule of thumb for best performance is to keep interval between average timer / 1000 and average timer / 3.