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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

spread operator

20.2M/s

Object.assign

8.1M/s

_.extend

5.6M/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);