Run results for: RegExp constructor vs literal using exec

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_5_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/141.0.7390.96 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 141

Operating system: iOS 18.5.0

Device Platform: Mobile

Date tested: 11 months ago

Benchmark engine: Benchmark.js

Literal

417.4M/s

new RegExp()

409.9M/s

View exact numbers

Test name	Executions per second
✓ Literal	417,378,112 Ops/sec
new RegExp()	409,876,416 Ops/sec

Script Preparation code:

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

Tests:

new RegExp()
reConstructor.exec('132abc67219f019afe12901a')
Literal
reLiteral.exec('132abc67219f019afe12901a')

Run results for: RegExp constructor vs literal using exec

Testing performance when using a new RegExp object vs a literal regex with exec method

new RegExp()

Literal