Run results for: DataView vs Uint32Array find

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Uint32Array

4K/s

DataView

3K/s

View exact numbers

Test name	Executions per second
✓ Uint32Array	3,902 Ops/sec
DataView	3,217 Ops/sec

Script Preparation code:

var size = 1048576;
var buf = new ArrayBuffer(size);
var view = new DataView(buf);
var u32view = new Uint32Array(buf);

var data = [];

for (let i = 0; i < u32view.length; i++) {
	u32view[i] = 10000*Math.random();
}

Tests:

DataView
for (let i = 0; i < buf.byteLength; i += 4) { if (view.getUint32(i, true) == 0x48384992) console.log('found'); }
Uint32Array
for (let i = 0; i < u32view.length; ++i) { if (view[i] == 0x48384992) console.log('found'); }