Run results for: shallow copy of arrays and objects

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

slice array

869K/s

Object.assign object

647K/s

spread object

338K/s

spread array

97K/s

klona array

15K/s

klona object

3K/s

View exact numbers

HTML Preparation code:

<script src="https://unpkg.com/klona@2.0.6/dist/index.js"></script>

Script Preparation code:

let array = Array(10000);
let object = {};
for (let i = 0, end = array.length; i < end; i += 1) {
  array[i] = i;
  object[i] = i;
}

Tests: