Run results for: copy copy copy copy copy

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser: Chrome 105

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
view.setUint8(i, data[i]);	64.8 Ops/sec
byte[i] = data[i];	69.4 Ops/sec
byte.set(data);	594682.4 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();
}

Tests:

view.setUint8(i, data[i]);
for (let i=0; i < size; i++) { view.setUint8(i, data[i]); }
byte[i] = data[i];
for (let i=0; i < size; i++) { byte[i] = data[i]; }
byte.set(data);
byte.set(data);

Run results for: copy copy copy copy copy

copy

view.setUint8(i, data[i]);

byte[i] = data[i];

byte.set(data);