Run results for: Single vs multiple regex replace calls

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

No regex

7.3M/s

Single, regex

5.4M/s

Single, group regex

5.4M/s

Multiple, regex

4.5M/s

View exact numbers

Test name	Executions per second
✓ No regex	7,274,094 Ops/sec
Single, regex	5,396,022 Ops/sec
Single, group regex	5,380,528 Ops/sec
Multiple, regex	4,524,363 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','')