Run results for: Dataview vs Uint8Array - read byte+

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser: Firefox 136

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

DataView

352K/s

Uint8Array

351K/s

View exact numbers

Test name	Executions per second
✓ DataView	351,765 Ops/sec
Uint8Array	351,052 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];