Run results for: RegExp constructor vs literals, with variations

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
new RegExp()	2693290.5 Ops/sec
RegExp() factory	2750929.0 Ops/sec
Literal	7627035.5 Ops/sec
Literal premade	7861440.0 Ops/sec
Premade constructor	7861206.5 Ops/sec
Premade constructor 2	7816552.5 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}$/.test('132abc67219f019afe12901a');
}
const premadeLiteral = /^[0-9a-fA-F]{24}$/;
function getRePremadeLiteral() {
  return premadeLiteral.test('132abc67219f019afe12901a');
}
const premadeConstructor = new RegExp('^[0-9a-fA-F]{24}$');
function getRePremadeConstructor() {
  return premadeConstructor.test('132abc67219f019afe12901a');
}
const premadeConstructor2 = new RegExp(/^[0-9a-fA-F]{24}$/);
function getRePremadeConstructor2() {
  return premadeConstructor2.test('132abc67219f019afe12901a');
}

Tests:

new RegExp()
getReConstructor()
RegExp() factory
getReFactory()
Literal
getReLiteral()
Literal premade
getRePremadeLiteral()
Premade constructor
getRePremadeConstructor()
Premade constructor 2
getRePremadeConstructor2()

Run results for: RegExp constructor vs literals, with variations

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

new RegExp()

RegExp() factory

Literal

Literal premade

Premade constructor

Premade constructor 2