Run results for: array vs Float64Array vs Float32Array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Float64Array reverse

256K/s

Float32Array reverse

255K/s

array reverse

75K/s

array i/o

23K/s

Float64Array i/o

21K/s

Float32Array i/o

17K/s

View exact numbers

Test name	Executions per second
✓ Float64Array reverse	256,441 Ops/sec
Float32Array reverse	254,558 Ops/sec
array reverse	75,267 Ops/sec
array i/o	22,591 Ops/sec
Float64Array i/o	21,299 Ops/sec
Float32Array i/o	16,901 Ops/sec

Script Preparation code:

var a = [...Array(10000)].map(_ => Math.random());
var ta = (new Float64Array(10000)).map(_ => Math.random());
var tb = (new Float32Array(10000)).map(_ => Math.random());

Tests:

array reverse
a.reverse();
Float64Array reverse
ta.reverse();
array i/o
for (let i = 0; i < 10000; ++i) a[i] = a[i] + 1;
Float64Array i/o
for (let i = 0; i < 10000; ++i) ta[i] = ta[i] + 1;
Float32Array reverse
tb.reverse();
Float32Array i/o
for (let i = 0; i < 10000; ++i) tb[i] = tb[i] + 1;