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

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Chrome OS 14541.0.0

Device Platform: Desktop

Date tested: one year ago

toLocalString

31.5M/s

Intl.NumberFormat

2.9M/s

View exact numbers

Test name	Executions per second
✓ toLocalString	31,469,252 Ops/sec
Intl.NumberFormat	2,872,987 Ops/sec

Script Preparation code:

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

Tests: