Run results for: Intl.DateTimeFormat

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.1.1

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

without Intl.DateTimeFormat

93.8M/s

with Intl.DateTimeFormat

622K/s

View exact numbers

Test name	Executions per second
✓ without Intl.DateTimeFormat	93,797,776 Ops/sec
with Intl.DateTimeFormat	621,629 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