Run results for: DataView vs Uint8Array by bytes

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:136.0) Gecko/136.0 Firefox/136.0

Browser: Firefox Mobile 136

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

DataView

851.8M/s

Uint8Array by byte

848.1M/s

Uint8Array with set

866K/s

View exact numbers

Test name	Executions per second
✓ DataView	851,808,960 Ops/sec
Uint8Array by byte	848,092,288 Ops/sec
Uint8Array with set	865,589 Ops/sec

Script Preparation code:

var size = 0xFF;
var buf = new ArrayBuffer(size);
var view = new DataView(buf);
var byte = new Uint8Array(buf);

var data = [];

for (let i = 0; i < size; i++) {
	data[i] = 100*Math.random();
}

Tests:

DataView
for (let i; i < size; i++) { view.setUint8(i, data[i]); }
Uint8Array by byte
for (let i; i < size; i++) { byte[i] = data[i]; }
Uint8Array with set
byte.set(data, 0);