Run results for: Dataview vs Uint8Array - read byte+

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 Edg/126.0.0.0

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Uint8Array

6K/s

DataView

5K/s

View exact numbers

Test name	Executions per second
✓ Uint8Array	5,658 Ops/sec
DataView	5,178 Ops/sec

Script Preparation code:

var size = 1024;
var buffer = new ArrayBuffer(size);
var bytes = new Uint8Array(buffer);
var dv = new DataView(buffer);
var dvRes = 0; //make sure results aren't thrown away by v8
var uRes = 0; //make sure results aren't thrown away by v8

for (var i = 0; i < size; i++)
  dv.setUint8(i, Math.ceil(Math.random() * 255));

Tests:

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