Run results for: Object.assign vs spread operator for settting values

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36

Browser: Chrome 79

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Object.assign	4240416.0 Ops/sec
spread operator	15960380.0 Ops/sec
jQuery extend	3699235.0 Ops/sec

HTML Preparation code:

<script
  src="https://code.jquery.com/jquery-3.4.1.js"
  integrity="sha256-WpOohJOqMqqyKL9FccASB9O0KwACQJpFTUBLTYOVvVU="
  crossorigin="anonymous"></script>

Tests:

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

Run results for: Object.assign vs spread operator for settting values

Object.assign

spread operator

jQuery extend