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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=565647" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0
Browser:
Firefox 131
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Literal
11.1M/s
new RegExp()
10.9M/s
new RegExp(Literal)
8.1M/s
View exact numbers
Test name
Executions per second
✓
Literal
11,088,516 Ops/sec
new RegExp()
10,878,596 Ops/sec
new RegExp(Literal)
8,057,728 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}$/)
Tests:
new RegExp()
reConstructor.test('132abc67219f019afe12901a')
Literal
reLiteral.test('132abc67219f019afe12901a')
new RegExp(Literal)
var reConstLiteral = new RegExp(/^[0-9a-fA-F]{24}$/)