Benchmark: jQuery.extend vs JSON.stringify(JSON.parse())

HTML Preparation code:

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

Tests:

jQuery.extend
const arr1 = [ true, 1, "true", [], {}, function () {} ]; const arr2 = $.extend(arr1);
JSON.stringify
const arr1 = [ true, 1, "true", [], {}, function () {} ]; const arr2 = JSON.parse(JSON.stringify(arr1));

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

jQuery.extend

3.2M/s

JSON.stringify

2.3M/s

Fastest: jQuery.extend (1.4x faster)

View exact numbers

✓ jQuery.extend: 3,197,944 ops/sec
• JSON.stringify: 2,304,888 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery.extend
JSON.stringify

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0

Browser/OS: Firefox 145 on Windows

View result in a separate tab

jQuery.extend

3.6M/s

JSON.stringify

2.9M/s

View exact numbers

Test name	Executions per second
✓ jQuery.extend	3,647,807 Ops/sec
JSON.stringify	2,880,552 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to compare two approaches for merging data: jQuery.extend() and JSON.parse(JSON.stringify()). The goal is to determine which approach is faster.

**Options Compared**

There are only two options compared in this benchmark:

1. **jQuery.extend()**: This method is used to merge one or more objects into another object. It's a part of the jQuery library, a popular JavaScript library for DOM manipulation and event handling.
2. **JSON.parse(JSON.stringify())**: This approach involves converting an object to JSON using JSON.stringify(), parsing the resulting string back to an object using JSON.parse(), and then converting that object back to JSON again.

**Pros and Cons**

Here are some pros and cons of each approach:

1. **jQuery.extend()**:
	* Pros: Fast, efficient, and widely supported by jQuery users.
	* Cons: Requires including the jQuery library, which can add overhead to the benchmark.
2. **JSON.parse(JSON.stringify())**:
	* Pros: Does not require any external libraries or dependencies.
	* Cons: Can be slower due to the extra parsing steps, and may not work correctly with all data types.

**Library Used**

The `$.extend()` method is part of the jQuery library, which provides a convenient way to merge objects. The `JSON.parse()` and `JSON.stringify()` methods are part of the JavaScript Standard Library, but in this context, they're used together to perform an additional parsing step.

**Special JS Features or Syntax**

None mentioned in the provided benchmark definition.

**Benchmark Preparation Code**

The preparation code includes a script tag that loads the jQuery library version 3.6.0. This is necessary for the benchmark to work correctly with the `$.extend()` method.

**Alternative Approaches**

Some alternative approaches for merging data could be:

* Using the spread operator (`{ ...obj1, ...obj2 }`)
* Using the `Object.assign()` method
* Implementing a custom merge function

However, these alternatives are not being tested in this benchmark.

In summary, the benchmark is designed to compare two approaches for merging data: jQuery.extend() and JSON.parse(JSON.stringify()). The pros and cons of each approach have been discussed, along with an explanation of the libraries used.

jQuery.extend vs JSON.stringify(JSON.parse()) (version: 0) Benchmark.js

Comparing performance of: `jQuery.extend vs JSON.stringify`

Created: 4 years ago by: Guest

Go to the latest result

jQuery.extend

JSON.stringify

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

jQuery.extend vs JSON.stringify(JSON.parse()) (version: 0) Benchmark.js

Comparing performance of: jQuery.extend vs JSON.stringify

Created: 4 years ago by: Guest

Go to the latest result

jQuery.extend

JSON.stringify

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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Comparing performance of: `jQuery.extend vs JSON.stringify`