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

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()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
new RegExp()
RegExp() factory
Literal
Literal premade

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 17 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Windows

View result in a separate tab

Test name	Executions per second
new RegExp()	5547884.0 Ops/sec
RegExp() factory	5522947.0 Ops/sec
Literal	13249290.0 Ops/sec
Literal premade	9706220.0 Ops/sec

RegExp constructor vs literal vs premade, constructing in function, inline the test (version: 0)

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

Comparing performance of: new RegExp() vs RegExp() factory vs Literal vs Literal premade

Created: 4 years ago by: Guest

Jump to the latest result

new RegExp()

RegExp() factory

Literal

Literal premade

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A