Run results for: array vs Float64Array vs mixed array

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

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

typedArray reverse

402K/s

array reverse

158K/s

mixed array reverse

90K/s

typedArray i/o

40K/s

array i/o

39K/s

mixed array i/o

9K/s

View exact numbers

Test name	Executions per second
✓ typedArray reverse	401,879 Ops/sec
array reverse	158,038 Ops/sec
mixed array reverse	90,207 Ops/sec
typedArray i/o	39,565 Ops/sec
array i/o	39,133 Ops/sec
mixed array i/o	9,482 Ops/sec

Script Preparation code:

var a = [...Array(10000)].map(_ => Math.random());
var ma = [...a];
ma[5000] = 'string';
var ta = (new Float64Array(10000)).map(_ => Math.random());

Tests:

array reverse
a.reverse();
typedArray reverse
ta.reverse();
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;
mixed array reverse
ma.reverse();
mixed array i/o
for (let i = 0; i < 10000; ++i) ma[i] = ma[i] + 1;