Run results for: split-join vs regex replace

Run details:

User agent: Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36

Browser: Chrome 90

Operating system: Windows 8

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
replace regex	3654929.8 Ops/sec
split-join	2339143.0 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("+");

Run results for: split-join vs regex replace

replace regex

split-join