Run results for: Object merge vs library merge

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.62 Safari/537.36

Browser: Chrome 67

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Object.assign	615378.4 Ops/sec
jQuery extend	0.0 Ops/sec
Immutable merge	280135.3 Ops/sec
Ramda merge	659245.1 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