Run results for: substr vs startsWith

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Windows

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
substr	578967616.0 Ops/sec
startsWith	590398400.0 Ops/sec

Script Preparation code:

var str = "abcdefghijklmnopqrstuvwxyz";

Tests: