Run results for: Single vs multiple regex replace calls new new

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.6 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Multiple, regex

18.6M/s

Single, regex

7.7M/s

View exact numbers

Test name	Executions per second
✓ Multiple, regex	18,573,382 Ops/sec
Single, regex	7,662,520 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, 'A').replace(/e/g,'E')
Single, regex
str = str.replace(/a|e/g, match => match === 'a' ? 'A' : 'B')