Run results for: includes + toLowerCase vs RegExp + i

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0.1 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 9 months ago

RegExp + i

524.7M/s

lowercase + includes

54.5M/s

View exact numbers

Test name	Executions per second
✓ RegExp + i	524,701,824 Ops/sec
lowercase + includes	54,473,492 Ops/sec

Script Preparation code:

var str = "This is a simple test!";
var needle = "sImPle";

Tests: