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: 7 months ago

Benchmark engine: Benchmark.js

startsWith

590.4M/s

substr

579.0M/s

View exact numbers

Test name	Executions per second
✓ startsWith	590,398,400 Ops/sec
substr	578,967,616 Ops/sec

Script Preparation code:

var str = "abcdefghijklmnopqrstuvwxyz";

Tests: