Run results for: DataView vs Uint8Array by bytes vs Uint8Array set Uint8Array vs DataView loop

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser: Firefox 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Uint8Array by byte

2235.6M/s

DataView

2189.0M/s

Uint8Array with set other Uint8Array

49.5M/s

DataView loop

9.8M/s

Uint8Array with set

1.3M/s

View exact numbers

Test name	Executions per second
✓ Uint8Array by byte	2,235,617,792 Ops/sec
DataView	2,188,974,080 Ops/sec
Uint8Array with set other Uint8Array	49,529,444 Ops/sec
DataView loop	9,757,874 Ops/sec
Uint8Array with set	1,328,063 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();
}

var dataBytes = new Uint8Array(data);
var dataView = new DataView(dataBytes.buffer);

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);
Uint8Array with set other Uint8Array
byte.set(dataBytes, 0);
DataView loop
for (let i = 0; i < dataBytes.length; i++) { view.setUint8(i, dataView.getUint8(i)); }