Run results for: DataView vs Uint8Array by bytes

Run details:

User agent: Mozilla/5.0 (Android 10; Mobile; rv:85.0) Gecko/85.0 Firefox/85.0

Browser: Firefox Mobile 85

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
DataView	390222560.0 Ops/sec
Uint8Array by byte	389276576.0 Ops/sec
Uint8Array with set	594955.4 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