Run results for: DataView vs Uint8Array (read bytes)

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/122.2 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 17

Operating system: iOS 17.2.1

Device Platform: Mobile

Date tested: 2 years ago

read bytes (DataView)

71K/s

read bytes (Uint8Array)

68K/s

View exact numbers

Test name	Executions per second
✓ read bytes (DataView)	70,739 Ops/sec
read bytes (Uint8Array)	67,770 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;