Benchmark: Deep copy performance

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

var data = [];
var res = [];

fetch('https://jsonplaceholder.typicode.com/posts')
  .then(response => response.json())
  .then(json => data = json)

Tests:

jQuery direct extend
res = []; $.extend(true, res, data);
jQuery extend assignment
res = $.extend(true, [], data);
Lodash cloneDeep
res = _.cloneDeep(data);
JSON parse and stringify
res = JSON.parse(JSON.stringify(data));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery direct extend
jQuery extend assignment
Lodash cloneDeep
JSON parse and stringify

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36

Browser/OS: Chrome 97 on Windows

View result in a separate tab

Test name	Executions per second
jQuery direct extend	20256.2 Ops/sec
jQuery extend assignment	15439.9 Ops/sec
Lodash cloneDeep	15479.3 Ops/sec
JSON parse and stringify	8984.4 Ops/sec

Deep copy performance (version: 5)

Comparing performance of: jQuery direct extend vs jQuery extend assignment vs Lodash cloneDeep vs JSON parse and stringify

Created: 5 years ago by: Registered User

Jump to the latest result

jQuery direct extend

jQuery extend assignment

Lodash cloneDeep

JSON parse and stringify

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A