Run results for: copy ArrayBuffer: DataView vs Uint8Array.set vs by bytes ag-sockets v2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Browser: Chrome 95

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
DataView	810352.5 Ops/sec
Uint8Array by byte	801233.8 Ops/sec
Uint8Array with set	234663.4 Ops/sec

Script Preparation code:

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

Tests:

DataView
data[Date.now()%data.length] = 43;data[Date.now()%data.length] = 65; for (let i; i < size; i++) { view.setUint8(i, data[i]); }
Uint8Array by byte
data[Date.now()%data.length] = 43;data[Date.now()%data.length] = 65; for (let i; i < size; i++) { byte[i] = data[i]; }
Uint8Array with set
data[Date.now()%data.length] = 43;data[Date.now()%data.length] = 65; byte.set(new Uint8Array(data.buffer, data.byteOffset, data.length));

Run results for: copy ArrayBuffer: DataView vs Uint8Array.set vs by bytes ag-sockets v2

DataView

Uint8Array by byte

Uint8Array with set