Run results for: Single instance of Intl.NumberFormat vs toLocalString

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.80 Safari/537.36 Edg/98.0.1108.50

Browser: Chrome 98

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Intl.NumberFormat	1646447.6 Ops/sec
toLocalString	17362630.0 Ops/sec

HTML Preparation code:

<script> window.formatter = new Intl.NumberFormat("en-US");</script>

​x
 
​
<script> window.formatter = new Intl.NumberFormat("en-US");</script>

Tests:

Intl.NumberFormat
var a = formatter.format("10000");
var a = formatter.format("10000");
toLocalString
var a = "10000".toLocaleString("en-US");
var a = "10000".toLocaleString("en-US");