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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

replace regex

10.4M/s

split&join

8.8M/s

replace All

4.0M/s

View exact numbers

Test name	Executions per second
✓ replace regex	10,357,370 Ops/sec
split&join	8,767,081 Ops/sec
replace All	3,962,564 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('+');