Run results for: Object.assign vs spread vs _.extend

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Object.assign

9.7M/s

_.extend

7.8M/s

spread operator

6.6M/s

View exact numbers

HTML Preparation code:

<script src="https://underscorejs.org/underscore-min.js"></script>

Tests:

Object.assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign({ a: 2 }, params);
spread operator
var params = { b:"hello", c: true, d:7 }; var other = { a: 2, ...params };
_.extend
var params = { b:"hello", c: true, d:7 }; var other = _.extend({ a: 2 }, params);