Benchmark Run Result for: RegExp constructor vs literal vs premade, constructing in function, inline the test 2

RegExp constructor vs literal vs premade, constructing in function, inline the test 2

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

Date tested: 3 years ago

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36 Edg/97.0.1072.62

Test name	Executions per second
new RegExp()	1904295.8 Ops/sec
RegExp() factory	2670072.0 Ops/sec
Literal	6108107.5 Ops/sec
Literal premade	3218477.0 Ops/sec

Benchmark definition (click to collapse):

Script Preparation code:

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

Open this result on MeasureThat.net

RegExp constructor vs literal vs premade, constructing in function, inline the test 2

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

Date tested: 3 years ago

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36 Edg/97.0.1072.62

Benchmark definition (click to collapse):

new RegExp()

RegExp() factory

Literal

Literal premade