Run results for: Object.assign vs spread operator vs $.extend

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 YaBrowser/19.9.0.1768 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 19

Operating system: Mac OS X 10.15.0

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Object.assign	4345129.5 Ops/sec
spread operator	13393495.0 Ops/sec
jQuery extend	3043061.5 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Tests:

Object.assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign({ a: 2 }, params);
spread operator
var params = { b:"hello", c: true, d:7 }; var other = { a: 2, ...params };
jQuery extend
var params = { b:"hello", c: true, d:7 }; var other = $.extend({ a: 2 }, params);

Run results for: Object.assign vs spread operator vs $.extend

Object.assign

spread operator

jQuery extend