Script Preparation code:
AخA
 
const regexp = new RegExp(/^\-\-/);
const prefix = "--";
const str = "--some-var";
const numTests = 10000;
Tests:
  • .startsWith()

    x
     
    let i = 0;
    while (i < numTests) {
        str.startsWith(prefix);
        i++;
    }
  • RegExp

     
    let i = 0;
    while (i < numTests) {
        regexp.test(str);
        i++;
    }
Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

  • Test case name Result
    .startsWith()
    RegExp

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: 20 days ago)
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
Safari 18 on Mac OS X 10.15.7
View result in a separate tab
Test name Executions per second
.startsWith() 11413.1 Ops/sec
RegExp 159610.1 Ops/sec