Run results for: split-join vs regex replace

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

replace regex

6.3M/s

split-join

5.1M/s

View exact numbers

Test name	Executions per second
✓ replace regex	6,347,428 Ops/sec
split-join	5,141,362 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("+");