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Run results for:
RegExp constructor vs literal vs inline literal
Testing performance when using a new RegExp object vs a literal regex
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<iframe src="https://measurethat.net/Embed?id=604311" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0
Browser:
Firefox 138
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Inline literal
3.5M/s
Literal
3.5M/s
new RegExp()
3.1M/s
View exact numbers
Test name
Executions per second
✓
Inline literal
3,518,370 Ops/sec
Literal
3,503,541 Ops/sec
new RegExp()
3,125,018 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.test('132abc67219f019afe12901a')
Literal
reLiteral.test('132abc67219f019afe12901a')
Inline literal
/^[0-9a-fA-F]{24}$/.test('132abc67219f019afe12901a')