Run results for: Single vs multiple regex replace calls

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

No regex

23.6M/s

Multiple, regex

10.6M/s

Single, group regex

6.7M/s

Single, regex

6.5M/s

View exact numbers

Test name	Executions per second
✓ No regex	23,635,558 Ops/sec
Multiple, regex	10,558,963 Ops/sec
Single, group regex	6,700,928 Ops/sec
Single, regex	6,469,088 Ops/sec

Script Preparation code:

var str = "Et inventore ut est. Illum dolorem similique odit. Velit necessitatibus unde nostrum sequi ut pariatur suscipit sit magnam. Cum esse sed quod aut id. Recusandae vel commodi."

Tests:

Multiple, regex
str = str.replace(/a/g, '').replace(/e/g,'')
Single, regex
str = str.replace(/a|e/g, '')
Single, group regex
str = str.replace(/[ae]+/g, '')
No regex
str = str.replace('a', '').replace('e','')