Benchmark: $.each vs Array.forEach

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>

Script Preparation code:

var array = [];
var i = 0;
while (i < 1000) {
  array.push(i++);
}

Tests:

Array.forEach
array.forEach(function (element, index) { console.log(index + " " + element); });
$.each
$.each(array, function (index, element) { console.log(index + " " + element); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.forEach
$.each

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 24 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmarking test case.

**What is tested?**

The test compares the performance of two iteration methods for arrays: `$.each` (using jQuery) and `Array.forEach`. Both methods are used to iterate over an array of 1000 elements, logging the index and value of each element to the console.

**Options compared**

There are only two options being compared:

1. **$.each**: A method provided by jQuery that iterates over an array using a callback function.
2. **Array.forEach**: A native JavaScript method that iterates over an array using a callback function.

**Pros and cons of each approach**

* **$.each**:
	+ Pros: Widely supported, easy to use, and often considered more forgiving due to its flexibility in handling errors.
	+ Cons: Requires jQuery library, which may not be desirable for all projects. Additionally, the callback function's `this` context is not automatically bound, which can lead to issues if not managed correctly.
* **Array.forEach**:
	+ Pros: Native JavaScript method, no external library required, and `this` context is automatically bound within the callback function.
	+ Cons: Less familiar to developers without prior experience with JavaScript, and some may find its syntax more verbose.

**Other considerations**

In this specific test case, both methods are performing a simple iteration task. However, in real-world scenarios, the choice between these two methods might depend on factors such as:

* Performance requirements
* Project-specific libraries or frameworks being used (e.g., jQuery is commonly used for DOM manipulation and event handling)
* Code readability and maintainability

**Library and syntax description**

In this test case, the `$.each` method uses jQuery's utility function to iterate over the array. The callback function passed to `$.each` takes two arguments: `index` (the current iteration index) and `element` (the value of the current element).

**Special JS feature or syntax**

There is no special JavaScript feature or syntax being used in this test case, except for the use of the `forEach` method, which is a modern JavaScript standard.

**Other alternatives**

If you wanted to add another iteration method to compare, some alternatives could be:

* Using a traditional `for` loop: `for (var i = 0; i < array.length; i++) { ... }`
* Using `Array.prototype.map()` and `console.log()`: `array.map(function(element) { console.log(element); });`

However, these alternatives would not provide the same level of comparison as using a callback function-based iteration method like `$`.each` or `Array.forEach`, which are specifically designed for iteration tasks.

In conclusion, this benchmark test case provides a straightforward comparison between two popular iteration methods in JavaScript. By understanding the pros and cons of each approach, developers can make informed decisions about which method to use depending on their specific project requirements and preferences.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Browser/OS: Firefox 78 on Windows

View result in a separate tab

Test name	Executions per second
Array.forEach	20.5 Ops/sec
$.each	21.0 Ops/sec

Related benchmarks:

$.each vs Array.forEach (version: 0)

compare iteration for array with 1000 elements

Comparing performance of: Array.forEach vs $.each

Created: 4 years ago by: Guest

Jump to the latest result

Array.forEach

$.each

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 24 days ago):