Run results for: RegExp constructor vs literal vs premade, constructing in function, inline the test

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0

Browser: Firefox 90

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
new RegExp()	4611571.0 Ops/sec
RegExp() factory	4544099.5 Ops/sec
Literal	9713746.0 Ops/sec
Literal premade	10938904.0 Ops/sec

Script Preparation code:

function getReConstructor() {
  return new RegExp('^[0-9a-fA-F]{24}$').test('132abc67219f019afe12901a');
}
function getReFactory() {
  return RegExp('^[0-9a-fA-F]{24}$').test('132abc67219f019afe12901a');
}
function getReLiteral() {
  return /^[0-9a-fA-F]{24}$/.test('132abc67219f019afe12901a');
}
var premadeLiteral = /^[0-9a-fA-F]{24}$/;
function getRePremadeLiteral() {
  return premadeLiteral.test('132abc67219f019afe12901a');
}

Tests:

new RegExp()
getReConstructor()
RegExp() factory
getReFactory()
Literal
getReLiteral()
Literal premade
getRePremadeLiteral()

Run results for: RegExp constructor vs literal vs premade, constructing in function, inline the test

Testing performance when using a new RegExp object vs a literal regex

new RegExp()

RegExp() factory

Literal

Literal premade