Run results for: lastIndexOf vs split vs regex v2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

regex

13.9M/s

split

12.8M/s

lastIndexOf

8.2M/s

View exact numbers

Script Preparation code:

var str = 'player/attack-bottom/1'

Tests:

lastIndexOf
const idx = str.lastIndexOf('/') const r1 = str.substring(0, idx) const r2 = str.substring(idx + 1, str.length)
split
const splited = str.split('/') const r1 = splited.slice(-1).join('/') const r2 = splited[splited.length - 1]
regex
const [_, r1, r2] = str.match(/(.+)\/(\d+)$/)