Run results for: Number.toLocaleString vs Intl.NumberFormat single instance

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

6.3M/s

Number.toLocaleString

83K/s

View exact numbers

Test name	Executions per second
✓ Intl.NumberFormat	6,315,189 Ops/sec
Number.toLocaleString	82,616 Ops/sec

Script Preparation code:

const formatter = new Intl.NumberFormat(undefined, {
    style: 'currency',
    currency: 'RUB',
})

Tests:

Intl.NumberFormat
const currencyPlayNumber = 1; const translatedString = formatter.format(currencyPlayNumber);
Number.toLocaleString
const currencyPlayNumber = 1; const translatedString = currencyPlayNumber.toLocaleString(undefined, { style: 'currency', currency: 'RUB', })