Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0
Firefox 102
Windows
Desktop
2 years ago
Test name Executions per second
character index 112998800.0 Ops/sec
charAt() 108555880.0 Ops/sec
slice() 30537146.0 Ops/sec
Script Preparation code:
AخA
 
var str = 'foo bar baz';
var noop = Function.prototype;
Tests:
  • character index

     
    if (str[0] == 'f') noop();
  • charAt()

     
    if (str.charAt(0) == 'f') noop();
  • slice()

     
    if (str.slice(0, 1) == 'f') noop();