Run results for: includes + toUpperCase 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/18.1.1 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 7 days ago

Test name	Executions per second
uppercase + includes	14453384.0 Ops/sec
RegExp + i	18941530.0 Ops/sec

Script Preparation code:

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

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

Tests:

uppercase + includes
str.toUpperCase().includes(needle.toUpperCase())
str.toUpperCase().includes(needle.toUpperCase())
RegExp + i
new RegExp(needle, 'i').test(str);
new RegExp(needle, 'i').test(str);