Run results for: DataView vs Uint8Array by bytes

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.0

Browser: Firefox 126

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Uint8Array by byte

1414.7M/s

DataView

1391.4M/s

Uint8Array with set

600K/s

View exact numbers

Test name	Executions per second
✓ Uint8Array by byte	1,414,694,912 Ops/sec
DataView	1,391,359,104 Ops/sec
Uint8Array with set	600,072 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);