Run results for: regex vs split and trim

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Edg/127.0.0.0

Browser: Chrome 127

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Short regex	190377.1 Ops/sec
Long regex	190873.9 Ops/sec
Short split and trim	190838.0 Ops/sec
Long split and trim	189239.7 Ops/sec

Script Preparation code:

function generateText(length, containsOtherChars) {
    return [].constructor(length)
        .map(it => Math.random() > 0.5 ? ',' : containsOtherChars && Math.random() > 0.5 ? 'a' : ' ')
        .join("");
}

var shortEmptyText = generateText(100, false);
var shortNonEmptyText = generateText(100, true);

var longEmptyText = generateText(1000 * 1000 * 10, false);
var longNonEmptyText = generateText(1000 * 1000 * 10, true);

var regex = /^[\s,]*$/;

Tests:

Short regex
console.log(!!shortEmptyText.match(regex)?.length); console.log(!!shortNonEmptyText.match(regex)?.length);
Long regex
console.log(!!longEmptyText.match(regex)?.length); console.log(!!longNonEmptyText.match(regex)?.length);
Short split and trim
var sanitizedEmptyText = shortEmptyText.split(",").filter(it => !!it?.trim()).join(""); var sanitizedNonEmptyText = shortEmptyText.split(",").filter(it => !!it?.trim()).join(""); console.log(sanitizedEmptyText.length > 0); console.log(sanitizedNonEmptyText.length > 0);
Long split and trim
var sanitizedEmptyText = longEmptyText.split(",").filter(it => !!it?.trim()).join(""); var sanitizedNonEmptyText = longNonEmptyText.split(",").filter(it => !!it?.trim()).join(""); console.log(sanitizedEmptyText.length > 0); console.log(sanitizedNonEmptyText.length > 0);

Run results for: regex vs split and trim

Short regex

Long regex

Short split and trim

Long split and trim