Run results for: RegEx.test vs. String.lower.includes vs. String.match vs. String.upper.includes

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Browser: Chrome 141

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 9 months ago

String.toLowerCase.includes

166.2M/s

string.toUpperCase.includes

157.0M/s

RegEx.test

28.0M/s

String.match

6.8M/s

View exact numbers

Test name	Executions per second
✓ String.toLowerCase.includes	166,211,152 Ops/sec
string.toUpperCase.includes	157,030,432 Ops/sec
RegEx.test	28,021,670 Ops/sec
String.match	6,816,920 Ops/sec

Script Preparation code:

var string = "Lorem ipsum dolor sit amet, consectetur adipisicing elit. Architecto, aut dolorem earum fuga laudantium neque nostrum numquam odio omnis reprehenderit rerum voluptatum. Alias magnam nam natus, quae quidem sit suscipit?";
var regex = /maGnam/i;

Tests:

RegEx.test
regex.test(string);
String.toLowerCase.includes
string.toLowerCase().includes("magnam");
String.match
string.match(/maGnam/);
string.toUpperCase.includes
string.toUpperCase().includes("MAGNAM");