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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
replace regex	7760366.5 Ops/sec
split-join	7973048.0 Ops/sec
replaceAll	2340357.0 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 is it".replace(/ /g, "+");
split-join
"this is it".split(" ").join("+");
replaceAll
"this is it".replaceAll(" ", "+");

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

replace regex

split-join

replaceAll