Run results for: toUpperCase vs toLowerCase - true

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
toUpperCase	34323428.0 Ops/sec
toLowerCase	666824640.0 Ops/sec

Script Preparation code:

var text = 'SOME ARE UPPER some are lower';

Tests: