Run results for: DataView vs TypedArray Float64 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser: Chrome 108

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

array[i] = i; 2

223K/s

array[i] = i;

194K/s

view.setFloat64(i, i) 2

51K/s

view.setFloat64(i, i)

46K/s

View exact numbers

Test name	Executions per second
✓ array[i] = i; 2	222,832 Ops/sec
array[i] = i;	193,591 Ops/sec
view.setFloat64(i, i) 2	51,341 Ops/sec
view.setFloat64(i, i)	46,398 Ops/sec

Script Preparation code:

var buffer1 = new ArrayBuffer(1024 * Float64Array.BYTES_PER_ELEMENT);
var array = new Float64Array(buffer1);
var buffer2 = new ArrayBuffer(1024 * Float64Array.BYTES_PER_ELEMENT);
var view = new DataView(buffer2);

Tests:

array[i] = i;
for (let i = 0; i < 1024; i += 1) { if (i === 0) { array[i] = 1; } else { array[i] = array[i-1] + i;; } }
view.setFloat64(i, i)
for (let i = 0; i < 1024; i += 1) { if (i === 0) { view.setFloat64(i, 1); } else { view.setFloat64(i, view.getFloat64(i - 1) + i); } }
array[i] = i; 2
for (let i = 0; i < 1024; i += 1) { if (i === 0) { array[i] = 1; } else { array[i] = array[i-1] + i;; } }
view.setFloat64(i, i) 2
for (let i = 0; i < 1024; i += 1) { if (i === 0) { view.setFloat64(i, 1); } else { view.setFloat64(i, view.getFloat64(i - 1) + i); } }