Run results for: Dataview vs Uint8Array - read byte

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Uint8Array

4.0M/s

DataView

3.4M/s

View exact numbers

Test name	Executions per second
✓ Uint8Array	4,026,352 Ops/sec
DataView	3,435,402 Ops/sec

Script Preparation code:

var size = 1024;
var buffer = new ArrayBuffer(size);
var bytes = new Uint8Array(buffer);
var dv = new DataView(buffer);

for (var i = 0; i < size; i++)
  dv.setUint8(i, Math.ceil(Math.random() * 255));

Tests:

DataView
for (var i = 0; i < size; i++) dv.getUint8(i);
Uint8Array
for (var i = 0; i < size; i++) bytes[i];