Run results for: DataView vs Uint8Array by bytes vs Native Array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36

Browser: Chrome 90

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
DataView	12911560.0 Ops/sec
Uint8Array by byte	12899120.0 Ops/sec
Uint8Array with set	736197.0 Ops/sec
Native Array	12828040.0 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 = [];
var nativeArr = new Array(size);

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);
Native Array
for (let i; i < size; i++) { nativeArr[i] = data[i]; }

Run results for: DataView vs Uint8Array by bytes vs Native Array

DataView

Uint8Array by byte

Uint8Array with set

Native Array