Benchmark: cached Number.toLocaleString vs Intl.NumberFormat vs Regex

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', })
Regex
const currencyPlayNumber = 1; const translatedString = `${currencyPlayNumber}`.replace(/\B(?=(\d{3})+(?!\d))/g, ',');

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Linux

Regex

34.6M/s

Intl.NumberFormat

3.9M/s

Number.toLocaleString

62K/s

View exact numbers

cached Number.toLocaleString vs Intl.NumberFormat vs Regex (version: 1)