MeasureThat.net

Run results for: lodash.assign vs object.assign vs spread

lodash.merge is NOT equivalent to object.assign, it does much more work so obviously it's slower tbh though lodash.assign is probably just a wrapper for object.assign for all I know

Go to the benchmark
Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 13_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/19.1b16203 Mobile/15E148 Safari/605.1.15
Mobile Safari 13
iOS 13.1.2
Mobile
5 years ago
Test name Executions per second
lodash assign 3880079.5 Ops/sec
object.assign 6014277.5 Ops/sec
spread 1445973.5 Ops/sec
HTML Preparation code:
​x
 
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​
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<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Tests:

  • lodash assign

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

  • object.assign

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

  • spread

     
    var a = { a: 'oh', b: 'my' };
    var b = { c: 'goddess' };
    var c = { ...a, ...b };