Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36
Chrome 128
Mac OS X 10.15.7
Desktop
3 months ago
Test name Executions per second
lowercase + includes 11288930.0 Ops/sec
RegExp + i 5049307.5 Ops/sec
Script Preparation code:
AخA
 
var str = "This is a simple test!";
var needle = "sImPle";
Tests:
  • lowercase + includes

     
    str.toLowerCase().includes(needle.toLowerCase())
  • RegExp + i

     
    new RegExp(needle, 'i').test(str);