Run results for: DataView vs Uint32Array

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

Benchmark engine: Benchmark.js

Uint32Array loop

1.1M/s

DataView

897K/s

Uint32Array set

259K/s

View exact numbers

Test name	Executions per second
✓ Uint32Array loop	1,064,044 Ops/sec
DataView	896,721 Ops/sec
Uint32Array set	259,088 Ops/sec

Script Preparation code:

var size = 4 * 1000;
var buf = new ArrayBuffer(size);
var view = new DataView(buf);
var u32view = new Uint32Array(buf);

var data = [];

for (let i = 0; i < size/4; i++) {
	data[i] = 10000*Math.random();
}

Tests:

DataView
for (let i = 0, len = size/4; i < len; i++) { view.setUint32(i*4, data[i]); }
Uint32Array loop
for (let i = 0, len = size/4; i < len; i++) { u32view[i] = data[i]; }
Uint32Array set
u32view.set(data, 0)