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Run results for: lodash assign vs object.assign vs spread operator - variable and constant

Compares the creation of a new object by merging two existing ones using lodash, Object.assign and the spread operator, when merging an object literal with an object from a variable.

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.83 Safari/537.36
Chrome 99
Mac OS X 10.13.6
Desktop
2 years ago
Test name Executions per second
lodash assign 1191043.2 Ops/sec
object.assign 2058344.1 Ops/sec
spread 3994581.8 Ops/sec
HTML Preparation code:
​x
 
1
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2
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.20/lodash.min.js'></script>
Script Preparation code:
 
var other = { c: 'goddness', d: '!' };
Tests:

  • lodash assign

     
    var result = _.assign({ a: 'oh', b: 'my' }, other);

  • object.assign

     
    var result = Object.assign({ a: 'oh', b: 'my' }, other);

  • spread

     
    var result = { a: 'oh', b: 'my', ...other };