Run results for: Single vs multiple regex replace calls

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0

Browser: Firefox 139

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

No regex

47.3M/s

Multiple, regex

23.1M/s

Single, regex

14.4M/s

Single, group regex

13.1M/s

View exact numbers

Test name	Executions per second
✓ No regex	47,320,272 Ops/sec
Multiple, regex	23,121,480 Ops/sec
Single, regex	14,362,458 Ops/sec
Single, group regex	13,133,473 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','')