Run results for: array vs float32array performance test

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.1

Device Platform: Mobile

Date tested: one year ago

typedArray sort

82K/s

create arrays

9K/s

typedArray i/o

2K/s

array sort

2K/s

array i/o

2K/s

typedArray i/o w convert back to array

2K/s

create typed arrays

1K/s

create typed arrays in typed array

590/s

View exact numbers

Test name	Executions per second
✓ typedArray sort	82,378 Ops/sec
create arrays	9,104 Ops/sec
typedArray i/o	2,226 Ops/sec
array sort	2,173 Ops/sec
array i/o	2,091 Ops/sec
typedArray i/o w convert back to array	1,613 Ops/sec
create typed arrays	1,433 Ops/sec
create typed arrays in typed array	590 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]); }