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Run results for:
RegExp constructor vs literal vs RegExp+Literal
Testing performance when using a new RegExp object vs a literal regex
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<iframe src="https://measurethat.net/Embed?id=499381" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Literal
9.4M/s
new RegExp()
9.3M/s
new RegExp(Literal)
5.2M/s
View exact numbers
Test name
Executions per second
✓
Literal
9,352,745 Ops/sec
new RegExp()
9,269,594 Ops/sec
new RegExp(Literal)
5,155,530 Ops/sec
Script Preparation code:
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}$/)
Tests:
new RegExp()
reConstructor.test('132abc67219f019afe12901a')
Literal
reLiteral.test('132abc67219f019afe12901a')
new RegExp(Literal)
var reConstLiteral = new RegExp(/^[0-9a-fA-F]{24}$/)