Run results for: 64k bytes of crypto.getRandomValues vs Math.Random (part 2)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

64k bytes Crypto API

4K/s

Array.map()

306/s

Array for loop

235/s

Array.forEach()

225/s

View exact numbers

Script Preparation code:

var arr32 = new Uint32Array(16384) // 16k * 4 bytes per u32 = 64k

Tests:

64k bytes Crypto API
crypto.getRandomValues(arr32)
Array.map()
arr32.map(e => Math.random() * 4294967296)
Array.forEach()
arr32.forEach((_, i) => { arr32[i] = Math.random() * 4294967296 })
Array for loop
for (let i = 0; i < 16384; i++) { arr32[i] = Math.random() * 4294967296 }