Benchmark: DataView vs Uint8Array by bytes vs Uint8Array set Uint8Array

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);

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);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
DataView
Uint8Array by byte
Uint8Array with set
Uint8Array with set other Uint8Array

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.66 Safari/537.36

Browser/OS: Chrome 103 on Windows

View result in a separate tab

Test name	Executions per second
DataView	13657330.0 Ops/sec
Uint8Array by byte	13575750.0 Ops/sec
Uint8Array with set	792209.8 Ops/sec
Uint8Array with set other Uint8Array	5871649.0 Ops/sec

DataView vs Uint8Array by bytes vs Uint8Array set Uint8Array (version: 0)

Comparing performance of: DataView vs Uint8Array by byte vs Uint8Array with set vs Uint8Array with set other Uint8Array

Created: one year ago by: Guest

Jump to the latest result

DataView

Uint8Array by byte

Uint8Array with set

Uint8Array with set other Uint8Array

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A