Run results for: builtin replaceAll vs regex replace

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36

Browser: Chrome 89

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
replace regex	5505375.0 Ops/sec
replace All	3781184.0 Ops/sec
replace All Regex	1461689.0 Ops/sec

Script Preparation code:

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

Tests:

replace regex
"this is it".replace(/ /g, "+");
replace All
"this is it".replaceAll(" ", "+");
replace All Regex
"this is it".replaceAllRegex(" ", "+");

Run results for: builtin replaceAll vs regex replace

replace regex

replace All

replace All Regex