Run results for: DataView vs Uint8Array (read bytes)

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:74.0) Gecko/20100101 Firefox/74.0

Browser: Firefox 74

Operating system: Windows 7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
read bytes (DataView)	45089.4 Ops/sec
read bytes (Uint8Array)	226347.5 Ops/sec

Script Preparation code:

var size = 0xFF;
var buf = new ArrayBuffer(size);
var view = new DataView(buf);
var byte = new Uint8Array(buf);
var test_sum = 0;

Tests:

read bytes (DataView)
let sum = 0; for (let i=0; i < size; i++) { let val = view.getUint8(i); sum += val; sum |= val; sum ^= val; } test_sum = sum;
read bytes (Uint8Array)
let sum = 0; for (let i=0; i < size; i++) { let val = byte[i]; sum += val; sum |= val; sum ^= val; } test_sum = sum;