Benchmark: Cloning Array - MeasureThat.net

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:


const userArray  = new Array(100000).fill({firstName: 'lorenzo', lastName: 'gomez'});

Tests:

Spread
const spreadCopy = [...userArray]
ForEach with push
const forEachCopy = []; userArray.forEach(user => { forEachCopy.push(user); });
For with pre-allocated array
const preAllocatedArray = new Array(100000); for(let i= 0; i < 100000; i++){ preAllocatedArray[i] = userArray[i]; }

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36 Edg/132.0.0.0

Browser/OS: Chrome 132 on Windows

Spread

4K/s

For with pre-allocated array

2K/s

ForEach with push

414/s

View exact numbers

Cloning Array (version: 1)