Benchmark: copy ArrayBuffer: DataView vs Uint8Array.set vs Float64Array.set vs by bytes v2

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();
}

window._data = data;
window._buf = buf;

Tests:

DataView
data[Date.now()%data.length] = 43; for (let i; i < size; i++) { view.setUint8(i, data[i]); }
Uint8Array by byte
data[Date.now()%data.length] = 43; for (let i; i < size; i++) { byte[i] = data[i]; }
Uint8Array with set
data[Date.now()%data.length] = 43; byte.set(data);
with Float64Array
data[Date.now()%data.length] = 43; (new Float64Array(buf, 0, size/8)) .set(new Float64Array(data.buffer, 0, size/8));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
DataView
Uint8Array by byte
Uint8Array with set
with Float64Array

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36 OPR/79.0.4143.72

Browser/OS: Opera 79 on Windows

View result in a separate tab

Test name	Executions per second
DataView	1840065.0 Ops/sec
Uint8Array by byte	1816404.0 Ops/sec
Uint8Array with set	360648.1 Ops/sec
with Float64Array	281877.3 Ops/sec

copy ArrayBuffer: DataView vs Uint8Array.set vs Float64Array.set vs by bytes v2 (version: 0)

Comparing performance of: DataView vs Uint8Array by byte vs Uint8Array with set vs with Float64Array

Created: 2 years ago by: Guest

Jump to the latest result

DataView

Uint8Array by byte

Uint8Array with set

with Float64Array

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A