Run results for: includes + toLowerCase vs RegExp + i

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

lowercase + includes

7.4M/s

RegExp + i

4.2M/s

View exact numbers

Test name	Executions per second
✓ lowercase + includes	7,375,858 Ops/sec
RegExp + i	4,179,374 Ops/sec

Script Preparation code:

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

Tests: