Run results for: replaceAll vs regex replace vs split&join

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser: Firefox 131

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

replace regex

4.5M/s

split&join

3.7M/s

replace All

2.0M/s

View exact numbers

Test name	Executions per second
✓ replace regex	4,462,397 Ops/sec
split&join	3,690,709 Ops/sec
replace All	2,033,336 Ops/sec

Script Preparation code:

String.prototype.replaceAll = function(search, replacement) {
    var target = this;
    return target.replace(new RegExp(search, 'g'), replacement);
};

Tests:

replace regex
"this {a} is {a} it".replace(/\{a\}/g, "+");
replace All
"this {a} is {a} it".replaceAll("{a}", "+");
split&join
"this {a} is {a} it".split('{a}').join('+');