MeasureThat.net

Run results for: DataView vs Uint8Array by bytes write + read

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Chrome 130
Windows
Desktop
5 months ago
Test name Executions per second
DataView 6526921.5 Ops/sec
Uint8Array by byte 6428717.5 Ops/sec
Uint8Array with set 1978330.1 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();
}
Tests:

  • DataView

     
    for (let i; i < size; i++) {
        view.setUint8(i, data[i]);
    }
    ​
    const results = []
    for (let i; i < size; i++) {
        results.push(view.getUint8(i, data[i]));
    }

  • Uint8Array by byte

     
    for (let i; i < size; i++) {
        byte[i] = data[i];
    }
    ​
    const results = [];
    for (let i; i < size; i++) {
        results.push(byte[i]);
    }

  • Uint8Array with set

     
    byte.set(data, 0);