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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
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<iframe src="https://measurethat.net/Embed?id=617399" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36
Browser:
Chrome 139
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
10 months ago
object.assign
52.7M/s
spread
40.2M/s
lodash assign
29.7M/s
View exact numbers
Test name
Executions per second
✓
object.assign
52,719,708 Ops/sec
spread
40,234,752 Ops/sec
lodash assign
29,683,840 Ops/sec
HTML Preparation code:
<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 };