Run results for: Intl.DateTimeFormat

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:89.0) Gecko/20100101 Firefox/89.0

Browser: Firefox 89

Operating system: Mac OS X 10.14

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
without Intl.DateTimeFormat	4299395.0 Ops/sec
with Intl.DateTimeFormat	273952.2 Ops/sec

Script Preparation code:

var x = new Date('5/11/2018');
var y = new Date('5/11/2018');

var dateOptions = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' };
var dateTimeFormat = new Intl.DateTimeFormat('en-US', dateOptions);

Tests:

without Intl.DateTimeFormat
var z = (x.getFullYear() === y.getFullYear() && x.getMonth() === y.getMonth() && x.getDate() === y.getDate());
with Intl.DateTimeFormat
var z = (dateTimeFormat.format(x) === dateTimeFormat.format(y));

Run results for: Intl.DateTimeFormat

Comparing 2 dates with Intl.DateTimeFormat vs using Date.get* methods

without Intl.DateTimeFormat

with Intl.DateTimeFormat