Run results for: js native lowercase vs native uppercase

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser: Chrome 139

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

native toUpperCase

166.1M/s

native toLowerCase

156.9M/s

View exact numbers

Test name	Executions per second
✓ native toUpperCase	166,140,656 Ops/sec
native toLowerCase	156,883,456 Ops/sec

Script Preparation code:

var test = 'More Text for TESTING'

Tests: