MeasureThat.net

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

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0
Firefox 136
Windows
Desktop
one month ago
Test name Executions per second
DataView 2188974080.0 Ops/sec
Uint8Array by byte 2235617792.0 Ops/sec
Uint8Array with set 1328063.2 Ops/sec
Uint8Array with set other Uint8Array 49529444.0 Ops/sec
DataView loop 9757874.0 Ops/sec
Script Preparation code:
​x
 
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));
    }