Run results for: toLocaleLowerCase vs collator

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
toLocaleLowerCase (en-US)	5984703.5 Ops/sec
collator (en-US)	5975300.0 Ops/sec
toLocaleLowerCase (tr)	1397762.1 Ops/sec
collator (tr)	4927303.5 Ops/sec

Script Preparation code:

var a = 'FOO BAR';
var b = 'foo bar';

var locale1 = 'en-US'
var locale2 = 'tr'

var collator1 = new Intl.Collator(locale1, { sensitivity: 'accent' });
var collator2 = new Intl.Collator(locale2, { sensitivity: 'accent' });

Tests:

toLocaleLowerCase (en-US)
a.toLocaleLowerCase(locale1) === b.toLocaleLowerCase(locale1)
collator (en-US)
collator1.compare(a, b) === 0
toLocaleLowerCase (tr)
a.toLocaleLowerCase(locale2) === b.toLocaleLowerCase(locale2)
collator (tr)
collator2.compare(a, b) === 0

Run results for: toLocaleLowerCase vs collator

toLocaleLowerCase (en-US)

collator (en-US)

toLocaleLowerCase (tr)

collator (tr)