When the method is called an array is returned:
$ node
> process.hrtime();
[ 31013, 815378921 ]
The official documentation states:
It is relative to an arbitrary time in the past. It is not related to the time of day and therefore not subject to clock drift. The primary use is for measuring performance between intervals.So measuring the time between two events is the actual purpose. The first event is recorded via an call to process.hrtime():
var start = process.hrtime();setTimeout(function() {
var elapsed = process.hrtime(start);
console.log(elapsed);
}, 1000);
[ 1, 14933877 ]So to get an actual useful value out of this array we have to do a little calculation:
var timeInMilliseconds = elapsed[0] * 1e3 + elapsed[1] / 1e6;Success!
The complete code example:
var start = process.hrtime();
setTimeout(function() {
var elapsed = process.hrtime(start);
var timeInMilliseconds = elapsed[0] * 1e3 + elapsed[1] / 1e6;
console.log(timeInMilliseconds);
}, 1000);
Install via:
npm install hirestimeInvokation:
var hirestime = require('hirestime');
//startpoint of the time measurement
var getElapsed = hirestime();
setTimeout(function() {
//returns the elapsed milliseconds
console.log(getElapsed());
}, 1000);
var hirestime = require('hirestime');
//startpoint of the time measurement
var getElapsed = hirestime();
setTimeout(function() {
//returns the elapsed seconds
console.log(getElapsed(hirestime.S));
}, 1000);
- hirestime.S the elapsed time in seconds
- hirestime.NS the elapsed time in nanoseconds
- hirestime.MS the elapsed time in milliseconds
