Run results for: regex v split

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
split	1040723328.0 Ops/sec
rgx	1040407552.0 Ops/sec

Script Preparation code:

var str = "tag:cool"

Tests:

split
function doSplit() { const parts = str.split(':') if (parts.length !== 2) { return null } return parts[0] }
rgx
const rgx = /(?<tag>[a-z]+):(.*)?/ function doRgx() { const res = str.match(rgx) if (!res) { return null } return res.groups?.tag ?? null }