MeasureThat.net

Run results for: RegExp constructor vs literal vs RegExp+Literal

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

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Chrome 131
Mac OS X 10.15.7
Desktop
3 months ago
Test name Executions per second
new RegExp() 21213728.0 Ops/sec
Literal 21296956.0 Ops/sec
new RegExp(Literal) 15380806.0 Ops/sec
Script Preparation code:
AخA
 
var reConstructor = new RegExp('^[0-9a-fA-F]{24}$')
var reLiteral = /^[0-9a-fA-F]{24}$/
var reConstLiteral = new RegExp(/^[0-9a-fA-F]{24}$/)
Tests:

  • new RegExp()

     
    reConstructor.test('132abc67219f019afe12901a')

  • Literal

     
    reLiteral.test('132abc67219f019afe12901a')

  • new RegExp(Literal)

     
    var reConstLiteral = new RegExp(/^[0-9a-fA-F]{24}$/)