Run results for: Object merge vs library merge

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.103 YaBrowser/18.7.1.924 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 18

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Object.assign	1158963.0 Ops/sec
jQuery extend	0.0 Ops/sec
Immutable merge	443735.3 Ops/sec
Ramda merge	1113437.0 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>

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 = { a: "hello", b: true, c: 7 }; var other = $.extend({}, { b: false, d: [ 1,2 ] }, params);
Immutable merge
var params = Immutable.fromJS({ a: "hello", b: true, c: 7 }); var other = params.merge({ b: false, d: [ 1,2 ] });
Ramda merge
var params = { a: "hello", b: true, c: 7 }; var other = R.merge({ b: false, d: [ 1,2 ] }, params);

Run results for: Object merge vs library merge

Object.assign

jQuery extend

Immutable merge

Ramda merge