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Run results for:
RegExp constructor vs literal using exec
Testing performance when using a new RegExp object vs a literal regex with exec method
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<iframe src="https://measurethat.net/Embed?id=619804" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Edg/141.0.0.0
Browser:
Chrome 141
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
6 months ago
Test name
Executions per second
new RegExp()
16826312.0 Ops/sec
Literal
16741214.0 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')