Run results for: Matching regex with i flag vs lowercasing the string 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
lowercasing the string	10122319.0 Ops/sec
RegExp + i	14076301.0 Ops/sec
Already lowercased	12466602.0 Ops/sec

Script Preparation code:

var str = "What if it's a much longer text here? Should we have an escape hatch? This is a Username!";
var strLower = str.toLowerCase();
var simpleNeedle = new RegExp('(user|account|log(i|o)n|net)((.)?(name|i.?d.?|log(i|o)n).?)?(.?((or|/).+|\\*|:))?$|benutzername|nome.?utente|nome (dell\')?account');
var needleWithI = new RegExp('(user|account|log(i|o)n|net)((.)?(name|i.?d.?|log(i|o)n).?)?(.?((or|/).+|\\*|:))?$|benutzername|nome.?utente|nome (dell\')?account', 'i');

Tests:

lowercasing the string
simpleNeedle.test(str.toLowerCase())
RegExp + i
needleWithI.test(str)
Already lowercased
simpleNeedle.test(strLower)

Run results for: Matching regex with i flag vs lowercasing the string 2

lowercasing the string

RegExp + i

Already lowercased