Run results for: DataView vs Uint8Array by bytes

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:86.0) Gecko/20100101 Firefox/86.0

Browser: Firefox 86

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
DataView	798459264.0 Ops/sec
Uint8Array by byte	786207168.0 Ops/sec
Uint8Array with set	721547.5 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);

Run results for: DataView vs Uint8Array by bytes

DataView

Uint8Array by byte

Uint8Array with set