Run results for: array vs float32array performance test

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

typedArray i/o

228K/s

array i/o

122K/s

typedArray sort

39K/s

create arrays

11K/s

typedArray i/o w convert back to array

4K/s

create typed arrays

2K/s

array sort

1K/s

create typed arrays in typed array

335/s

View exact numbers

Test name	Executions per second
✓ typedArray i/o	228,000 Ops/sec
array i/o	121,869 Ops/sec
typedArray sort	38,877 Ops/sec
create arrays	10,975 Ops/sec
typedArray i/o w convert back to array	3,769 Ops/sec
create typed arrays	2,233 Ops/sec
array sort	1,150 Ops/sec
create typed arrays in typed array	335 Ops/sec

Script Preparation code:

function getRandomInt(max) {
    return Math.floor(Math.random() * max);
}

var a = [...new Array(10000)].map(_ => getRandomInt(1000000));
var ta = (new Float32Array(10000)).map(_ => getRandomInt(1000000));

Tests:

array sort
a.sort();
typedArray sort
ta.sort();
array i/o
for (let i = 0; i < 10000; ++i) { a[i] = a[i] + 1; }
typedArray i/o
for (let i = 0; i < 10000; ++i) { ta[i] = ta[i] + 1; }
typedArray i/o w convert back to array
for (let i = 0; i < 10000; ++i) { ta[i] = ta[i] + 1; } let tb = Array.from(ta);
create arrays
const a = []; for (let i = 0; i < 10000; ++i) { a.push([i]); }
create typed arrays
const a = []; for (let i = 0; i < 10000; ++i) { a.push(new Float32Array([i])); }
create typed arrays in typed array
const a = new Float32Array(10000); for (let i = 0; i < 10000; ++i) { a[i] = new Float32Array([i]); }