Run results for: cached Intl.NumberFormat vs new Intl.NumberFormat vs toLocaleString currency

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1.1 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

toLocaleString

33.7M/s

cached Intl.NumberFormat

2.9M/s

new Intl.NumberFormat

41K/s

View exact numbers

Tests:

cached Intl.NumberFormat
window.a = window.a || new Intl.NumberFormat('en-US', { style: 'currency', currency: 'EUR' }); window.a.format("10000")
new Intl.NumberFormat
new Intl.NumberFormat('en-US', { style: 'currency', currency: 'EUR' }).format('10000');
toLocaleString
"10000".toLocaleString('en-US', { style: 'currency', currency: 'EUR' })