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use performance.now() when available #195

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merged 1 commit into from Nov 14, 2014
Merged

use performance.now() when available #195

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21 changes: 17 additions & 4 deletions functions/datetime/microtime.js
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@@ -1,13 +1,26 @@
function microtime(get_as_float) {
// discuss at: http://phpjs.org/functions/microtime/
// original by: Paulo Freitas
// improved by Dumitru Uzun (http://duzun.me)
// example 1: timeStamp = microtime(true);
// example 1: timeStamp > 1000000000 && timeStamp < 2000000000
// returns 1: true
// example 2: /^0\.[0-9]{1,6} [0-9]{10,10}$/.test(microtime())
// returns 2: true

var now = new Date()
.getTime() / 1000;
var s = parseInt(now, 10);

return (get_as_float) ? now : (Math.round((now - s) * 1000) / 1000) + ' ' + s;
if ( typeof performance !== 'undefined' && performance.now ) {
var now = ( performance.now() + performance.timing.navigationStart ) / 1e3;
if(get_as_float) return now;

var s = now | 0; // Math.round(now)
return ( Math.round((now - s) * 1e6) / 1e6 ) + ' ' + s;
}
else {
var now = ( Date.now ? Date.now() : new Date().getTime() ) / 1e3;
if(get_as_float) return now;

var s = now | 0; // Math.round(now)
return ( Math.round((now - s) * 1e3) / 1e3 ) + ' ' + s;
}
}