Run results for: Number.toLocaleString vs Intl.NumberFormat (single)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Intl.NumberFormat

5.6M/s

Number.toLocaleString

79K/s

View exact numbers

Test name	Executions per second
✓ Intl.NumberFormat	5,615,358 Ops/sec
Number.toLocaleString	78,736 Ops/sec

Script Preparation code:

const formatter = new Intl.NumberFormat('de-DE', { style: 'currency', currency: 'EUR' })

Tests:

Intl.NumberFormat
const number = 12345; const translatedString = formatter.format(number);
Number.toLocaleString
const number = 12345; const translatedString = number.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })