<script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
var params = { b:"hello", c: true, d:7 };
var other = Object.assign({ a: 2 }, params);
var params = { b:"hello", c: true, d:7 };
var other = JSON.parse(JSON.stringify({ b:"hello", c: true, d:7 }));
var params = { b:"hello", c: true, d:7 };
var other = $.extend({ a: 2 }, params);
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Object.assign | |
JSON | |
jQuery.extend |
Test name | Executions per second |
---|---|
Object.assign | 3689851.5 Ops/sec |
JSON | 937395.8 Ops/sec |
jQuery.extend | 2893794.2 Ops/sec |
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.
Benchmark Overview
The provided benchmark compares three different methods for assigning properties to an object:
Object.assign()
jQuery.extend()
(a method introduced by jQuery library)JSON.parse(JSON.stringify())
Options Compared
Each test case uses a different approach to achieve the same goal: assigning properties to an object. The options compared are:
Object.assign()
: A built-in JavaScript method that assigns one or more specified values to each property of an existing object.jQuery.extend()
: A method introduced by jQuery library, which extends an existing object with new properties.JSON.parse(JSON.stringify())
: A method that creates a deep copy of an object using the JSON.stringify() function.Pros and Cons
Here's a brief analysis of each approach:
Object.assign()
:jQuery.extend()
:$
property (i.e., jQuery objects).JSON.parse(JSON.stringify())
:Library Usage
The jQuery.extend()
method uses the jQuery library, which is a popular JavaScript library for DOM manipulation and event handling. The library provides a convenient way to extend objects with new properties.
Special JS Features/Syntax
There are no special JavaScript features or syntax used in this benchmark. All tests follow standard JavaScript conventions.
Other Alternatives
If you're interested in exploring alternative methods, here are a few options:
Object.create()
: Creates an object with the specified prototype.Array.prototype.reduce()
: Can be used to merge objects using a custom reduction function.Lodash.merge()
: A popular utility library that provides a robust way to merge objects.These alternatives may offer different performance characteristics or use cases, but they are not directly comparable to the methods tested in this benchmark.