Run details:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Mobile Safari/537.36
Chrome Mobile 119
Android
Mobile
one year ago
Test name Executions per second
startsWith 1675506.0 Ops/sec
regex 1403089.0 Ops/sec
indexOf 1837554.2 Ops/sec
Script Preparation code:
AخA
 
window.myString = "Hello, world!";
window.prefix = "Hello";
window.regex = /^Hello/;
Tests:
  • startsWith

     
    if (myString.startsWith(prefix)) {
       // do something
    }
  • regex

     
    if (regex.test(myString)) {
       // do something
    }
  • indexOf

     
    if (myString.indexOf(prefix) === 0) {
      // do something
    }