Run results for: Test Replace vs Split

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser: Chrome 105

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
RegExp	337521.6 Ops/sec
Test split	496850.8 Ops/sec

Script Preparation code:

var testString1 = "HelLo wHat's uP";
var testString2 = "Loremipsumalotof changes to be tested";

var testSplitTitleCase = (str) => {
    return str.split(' ')
        .map(w => w[0].toUpperCase() + w.substring(1).toLowerCase())
        .join(' ');
}

var testRegExpTitleCase = (str) => {
     return str.replace(/\w\S*/g, function (txt) {
        return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
    });
}

Tests:

RegExp
testRegExpTitleCase(testString1); testRegExpTitleCase(testString2);
Test split
testSplitTitleCase(testString1); testSplitTitleCase(testString2);

Run results for: Test Replace vs Split

RegExp

Test split