Run results for: Intl.DateTimeFormat.format2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Intl.DateTimeFormat.format	7063.5 Ops/sec
toLocaleString	372067.8 Ops/sec
toString	836652.4 Ops/sec

Script Preparation code:

var DATE_TIME_OPTIONS = {
  hour: 'numeric',
  minute: 'numeric',
  year: 'numeric',
  month: '2-digit',
  day: '2-digit',
};

var date = new Date(1234567890123);

Tests:

Intl.DateTimeFormat.format
Intl.DateTimeFormat('en-US', DATE_TIME_OPTIONS).format(date);
toLocaleString
date.toLocaleString()
toString
date.toString()

Run results for: Intl.DateTimeFormat.format2

Intl.DateTimeFormat.format

toLocaleString

toString