Run results for: Word split

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Browser: Chrome 71

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
function	62854.3 Ops/sec
through regexp	395691.3 Ops/sec

Script Preparation code:

function splitWords(text) {
    let word = '', newText = '';
    const capReg = new RegExp(/^[A-Z]$/);
    const alphaNumReg = new RegExp(/^[a-z0-9]$/);

    for (let i = 0; i <= text.length - 1; i++) {
        if (
            capReg.test(text[i]) && capReg.test(text[i + 1]) && alphaNumReg.test(text[i + 2]) ||
            alphaNumReg.test(text[i]) && capReg.test(text[i + 1]) ||
            !text[i + 1]
        ) {
            newText = `${newText} ${word}${text[i]}`;
            word = '';
        } else {
            word = word + text[i];
        }
    }

    return newText;
}

Tests:

function
splitWords('MyCamelCaseStringID');
through regexp
"MyCamelCaseStringID".replace(/([a-z0-9])([A-Z])/g, '$1 $2')

Run results for: Word split

function

through regexp