Run results for: Intl.NumberFormat vs toLocalString vs cached Intl.NumberFormat

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/107.0.5304.101 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 107

Operating system: iOS 16.1

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Intl.NumberFormat	28069.7 Ops/sec
toLocalString	14928048.0 Ops/sec
Intl.NumberFormat With cached formatter	1934779.0 Ops/sec

Script Preparation code:

var formatter = new Intl.NumberFormat("en-US");

Tests:

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

Run results for: Intl.NumberFormat vs toLocalString vs cached Intl.NumberFormat

Intl.NumberFormat

toLocalString

Intl.NumberFormat With cached formatter