Run results for: lodash merge vs deepmerge vs lodash/fp merge

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.5

Device Platform: Mobile

Date tested: 10 months ago

Test name	Executions per second
lodash merge	503661.2 Ops/sec
object.assign	2303055.8 Ops/sec
lodash/fp merge	363215.6 Ops/sec

HTML Preparation code:


<script src='https://cdn.jsdelivr.net/g/lodash@4(lodash.min.js+lodash.fp.min.js)'></script>
<script src='https://unpkg.com/deepmerge@3.2.0/dist/umd.js'></script>

Script Preparation code:

var fp = _.noConflict();

Tests:

lodash merge
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = _.merge({}, a, b);
object.assign
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = deepmerge({}, a, b);
lodash/fp merge
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = fp.merge(b, a);

Run results for: lodash merge vs deepmerge vs lodash/fp merge

lodash merge

object.assign

lodash/fp merge