Run results for: Date comparison with today

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36 OPR/67.0.3575.137

Browser: Opera 67

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Simple	520032.2 Ops/sec
toISOString()	409716.8 Ops/sec
Simple with cached date	1917643.5 Ops/sec
toISOString() with cached date	486593.2 Ops/sec
Simple with local date	1197104.2 Ops/sec
toISOString() with local date	418245.2 Ops/sec

Script Preparation code:

var x = new Date('2020-05-06');
var today = new Date();

Tests:

Simple
var diff = x.getFullYear() === new Date().getFullYear() && x.getMonth() === new Date().getMonth() && x.getDate() === new Date().getDate();
toISOString()
var diff2 = x.toISOString().substr(0, 10) === new Date().toISOString().substr(0, 10);
Simple with cached date
var diff3 = x.getFullYear() === today.getFullYear() && x.getMonth() === today.getMonth() && x.getDate() === today.getDate();
toISOString() with cached date
var diff4 = x.toISOString().substr(0, 10) === today.toISOString().substr(0, 10);
Simple with local date
var localToday = new Date(); var diff5 = x.getFullYear() === localToday.getFullYear() && x.getMonth() === localToday.getMonth() && x.getDate() === localToday.getDate();
toISOString() with local date
var localToday = new Date(); var diff6 = x.toISOString().substr(0, 10) === localToday.toISOString().substr(0, 10);