Run results for: regex vs. split().slice().join()

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

regex

12K/s

split().slice().join()

11K/s

View exact numbers

Test name	Executions per second
✓ regex	12,074 Ops/sec
split().slice().join()	10,510 Ops/sec

Script Preparation code:

var times = ['12:45:55.434542', '10:48:97jggg', '9:20:55.434542', '11:45', '12:45:55 12:30']

Tests:

regex
times.forEach(time => console.log(/\d+:\d+/.exec(time).shift()));
split().slice().join()
times.forEach(time => console.log(time.split(':').slice(0, 2).join(':')));