Run results for: floor vs bitwise-not

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36

Browser: Chrome 85

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
floor	1985843.2 Ops/sec
bitwise-not	2538886.5 Ops/sec

Script Preparation code:

window.array = [...Array(1000)].map((x, idx) => idx)

AخA
 
window.array = [...Array(1000)].map((x, idx) => idx)

Tests:

const rnd = window.array[Math.floor(Math.random() * window.array.length)]

 
const rnd = window.array[Math.floor(Math.random() * window.array.length)]

bitwise-not
const rnd = window.array[~~(Math.random() * window.array.length)]
const rnd = window.array[~~(Math.random() * window.array.length)]