Run results for: Object merge vs library merge Tomek

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.157 Safari/537.36

Browser: Chrome 74

Operating system: Mac OS X 10.14.3

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Object.assign	3410971.0 Ops/sec
jQuery extend	637160.0 Ops/sec
Immutable merge	885793.6 Ops/sec
Ramda merge	343636.7 Ops/sec
Spread operator	19146950.0 Ops/sec

HTML Preparation code:

<script type='text/javascript' src='https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.min.js'></script>
<script type='text/javascript' src='https://cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js'></script>
<script type='text/javascript' src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>
<script type='text/javascript' src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js'></script>

Tests:

Object.assign
var params = { a: "hello", b: true, c: 7 }; var other = Object.assign({}, { b: false, d: [ 1,2 ] }, params);
jQuery extend
var params = [1,2,3,4,5,6]; var other = $.extend({}, [7,8,9,10], params);
Immutable merge
var params = Immutable.fromJS([1,2,3,4,5,6]); var other = params.merge([7,8,9,10]);
Ramda merge
var params = [1,2,3,4,5,6]; var other = R.merge([7,8,9,10], params);
Spread operator
var params = [1,2,3,4,5,6]; var params2 = [7,8,9,10]; var output = [...params, ...params2]

Run results for: Object merge vs library merge Tomek

Object.assign

jQuery extend

Immutable merge

Ramda merge

Spread operator