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Run results for:
create a new Date object vs modifing an existing one
How expensive is creation of a Date instance.
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:151.0) Gecko/20100101 Firefox/151.0
Browser:
Firefox 151
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
19 days ago
Test name
Executions per second
new Date
1264750.9 Ops/sec
modify Date
1270573.2 Ops/sec
HTML Preparation code:
<div id="date.new"></div> <div id="date.set"></div>
Script Preparation code:
var now; var elNow = document.getElementById('date.new'); var date = new Date(0); var elSet = document.getElementById('date.set');
Tests:
new Date
now = new Date(); elNow.innerText = now;
modify Date
date.setTime(Date.now()); elSet.innerText = date;