Run results for: Intl.NumberFormat vs toLocalString vs RegExp - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; M2103K19PG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.101 Mobile Safari/537.36

Browser: Chrome Mobile 98

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Intl.NumberFormat	13381.6 Ops/sec
toLocalString	7005298.0 Ops/sec
RegExp	917033.8 Ops/sec

Tests:

Intl.NumberFormat
var a = new Intl.NumberFormat("en-US").format("10000");
toLocalString
var a = "10000".toLocaleString("en-US");
RegExp
"10000".toString().replace(/(\d)(?=(\d{3})+(?!\d))/g, '$1,')

;