Run results for: Intl.NumberFormat vs toLocalString ( predefine the NumberFormat instance )

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0.1 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 10 months ago

toLocalString

26.6M/s

Intl.NumberFormat

2.7M/s

View exact numbers

Test name	Executions per second
✓ toLocalString	26,597,708 Ops/sec
Intl.NumberFormat	2,741,172 Ops/sec

Script Preparation code:

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

Tests: