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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Browser: Chrome 95

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
replace regex	6938687.5 Ops/sec
replace All	1983494.8 Ops/sec
split&join	5342901.5 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('+');

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

replace regex

replace All

split&join