Run results for: Float32Array .set vs manual

Run details:

User agent: Mozilla/5.0 (Linux; Android 14; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.6613.146 Mobile Safari/537.36

Browser: Chrome Mobile 128

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

set

48K/s

manually

58/s

View exact numbers

Test name	Executions per second
✓ set	47,598 Ops/sec
manually	58 Ops/sec

Script Preparation code:

var size = 256*256*4;
var dataTensor = new Float32Array(size);
var previous = new Float32Array(size / 4);
var offset = 256*256*3;

for (let i = 0; i < size; i++) {
	dataTensor[i] = 100*Math.random();
  	dataTensor[i*2] = 100*Math.random();
  	dataTensor[i*3] = 100*Math.random();
  	dataTensor[i*4] = 100*Math.random();
	previous[i] = 100*Math.random();
}

Tests:

manually
for (let index = 0; index < previous.length; index++) { dataTensor[index + offset] = previous[index]; }
set
dataTensor.set(previous, offset);