Run results for: Copy ArrayBuffer: DataView vs per bytes

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

per bytes

67.2M/s

DataView

1K/s

View exact numbers

Test name	Executions per second
✓ per bytes	67,164,104 Ops/sec
DataView	1,388 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var size = 0xFFFF;

var source = new Uint8Array(size);
var target = new Uint8Array(size);

for (let i = 0; i < size; i++) {
	source[i] = 100*Math.random();
}

Tests:

per bytes
for (let i; i < size; i++) { target[i] = source[i]; }
DataView
var cloned = new ArrayBuffer(source.byteLength); var view = new DataView(cloned); for (var byteIndex = 0; byteIndex < source.byteLength; byteIndex++) { view.setInt8(byteIndex, source[byteIndex]); }