Benchmark: Native forEach vs jQuery.each

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Script Preparation code:

var arr = Array(1000).fill().map(() => Math.floor(100 * Math.random()));

Tests:

Native foreach
arr.forEach(item => { });
jQuery each
$.each(arr, item => { });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native foreach
jQuery each

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser/OS: Chrome 140 on Windows

View result in a separate tab

Native foreach

2.7M/s

jQuery each

756K/s

View exact numbers

Test name	Executions per second
✓ Native foreach	2,684,322 Ops/sec
jQuery each	756,378 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 JSON and explain what's being tested, compared, and the pros/cons of different approaches.

**Benchmark Definition**

The benchmark is comparing two JavaScript methods: `forEach` (native) and `$.each` (jQuery). The goal is to measure which one performs better in terms of execution speed on a given dataset.

**Script Preparation Code**

The script preparation code creates an array of 1000 random numbers using the `Array` constructor, `fill()`, and `map()` methods:
```javascript
var arr = Array(1000).fill().map(() => Math.floor(100 * Math.random()));
```
This code is executed before running the benchmark.

**Html Preparation Code**

The HTML preparation code includes a script tag that loads the jQuery library from a CDN:
```html
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>
```
This code is executed before running the benchmark as well.

**Individual Test Cases**

There are two test cases:

1. **Native `forEach`**: This test case runs the native JavaScript `forEach` method on the prepared array:
```javascript
arr.forEach(item => { });
```
2. **jQuery `.each()`**: This test case runs the jQuery `.each()` method on the prepared array, which is essentially equivalent to using a traditional `for` loop:
```javascript
$.each(arr, item => { });
```
**Benchmark Results**

The benchmark results show two browsers (Firefox 121) running the same test cases. The "Native `forEach`" test case has an execution speed of approximately 456,411 executions per second, while the ".jQuery `.each()`" test case has a slower execution speed of around 340,620 executions per second.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Native `forEach`**:
	+ Pros: Native JavaScript method, no additional library overhead.
	+ Cons: May not be optimized for performance, can be slower due to engine limitations.
* **jQuery `.each()`**:
	+ Pros: Optimized for performance by jQuery's engine, provides a more traditional iteration experience.
	+ Cons: Requires an additional library (jQuery) to be loaded.

**Library - jQuery**

The `$.each` method is part of the jQuery library, which provides a set of DOM manipulation and event handling APIs. In this benchmark, jQuery is used as a library to provide an alternative iteration mechanism.

Note that in modern JavaScript environments, you can use other libraries like Lodash or Ramda for iteration purposes, but they are not mentioned here.

**Special JS Feature - None**

There are no special JS features or syntax used in these test cases. The focus is on the fundamental performance comparison between native `forEach` and jQuery `.each()`.

**Other Alternatives**

Other alternatives to iterate over arrays in JavaScript include:

* Traditional `for` loops
* Array methods like `map()`, `filter()`, and `reduce()`
* Higher-order functions from libraries like Lodash or Ramda

These alternatives may offer different trade-offs between performance, readability, and maintainability.

Native forEach vs jQuery.each (version: 0) Benchmark.js

Comparing performance of: `Native foreach vs jQuery each`

Created: 4 years ago by: Registered User

Go to the latest result

Native foreach

jQuery each

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Native forEach vs jQuery.each (version: 0) Benchmark.js

Comparing performance of: Native foreach vs jQuery each

Created: 4 years ago by: Registered User

Go to the latest result

Native foreach

jQuery each

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `Native foreach vs jQuery each`