Run results for: ArrayBuffer.slice vs Uint8Array.slice

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/131.0.6778.73 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 131

Operating system: iOS 18.1.1

Device Platform: Mobile

Date tested: one year ago

Uint8Array.slice

32.4M/s

ArrayBuffer.slice

11.7M/s

View exact numbers

Test name	Executions per second
✓ Uint8Array.slice	32,418,412 Ops/sec
ArrayBuffer.slice	11,709,300 Ops/sec

Script Preparation code:

var bytes = [84,104,105,115,32,105,115,32,97,32,115,97,109,112,108,101,32,112,97,114,97,103,114,97,112,104,46];
var buffer = new ArrayBuffer(bytes);
var bufferArray = new Uint8Array(bytes);

Tests:

ArrayBuffer.slice
buffer.slice(3, 13);
Uint8Array.slice
bufferArray.slice(3, 13);