Benchmark: jQuery Each vs For

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>

Tests:

jQuery Each
var test = ['fe', 'fi', 'fo', 'fum']; $.each(test, function (ind, val) { console.log(val); });
For
var test = ['fe', 'fi', 'fo', 'fum']; for(var i = 0, j = test.length; i < j; i += 1){ console.log(test[i]); }

Historical Performance Data aggregated from 12 community runs

Desktop Results:

Chrome 12 runs

For

45K/s

jQuery Each

45K/s

View exact numbers

✓ For: 44,911 ops/sec
• jQuery Each: 44,553 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 Each
For

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser/OS: Firefox 137 on Windows

View result in a separate tab

For

86K/s

jQuery Each

82K/s

View exact numbers

Test name	Executions per second
✓ For	86,432 Ops/sec
jQuery Each	82,254 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 data to explain what is tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark definition outlines two test cases: "jQuery Each" and "For". These test cases aim to compare the performance of iterating over an array using jQuery's `.each()` method versus a traditional `for` loop.

**Options Compared**

1. **jQuery Each**: This option uses jQuery's `.each()` method, which iterates over the array and calls the callback function for each element.
2. **For Loop**: This option uses a traditional `for` loop to iterate over the array, accessing each element using its index (`test[i]`).

**Pros and Cons**

1. **jQuery Each**
	* Pros:
		+ Easier to write and read, especially for developers familiar with jQuery.
		+ Reduced memory usage since only one iteration variable needs to be declared.
	* Cons:
		+ May introduce additional overhead due to the need to traverse the DOM to find the next element in the array.
		+ Can lead to slower performance compared to a traditional `for` loop, especially for large arrays.
2. **For Loop**
	* Pros:
		+ Typically faster and more efficient than jQuery's `.each()` method.
		+ Direct access to elements without needing to traverse the DOM.
	* Cons:
		+ More verbose and harder to read for developers unfamiliar with traditional loops.

**Library: jQuery**

The `$.each()` function is part of the jQuery library, which provides a convenient way to iterate over arrays. When you use jQuery's `.each()` method, it also performs some additional operations, such as:

* Finding the next element in the array using `test[index]`.
* Updating the index variable (`ind`).
* Executing the callback function for each element.

This can introduce overhead and slow down the iteration process compared to a traditional `for` loop.

**Special JavaScript Feature/Syntax: None**

There are no special features or syntax used in these test cases. They only utilize standard JavaScript features and libraries (in this case, jQuery).

**Alternative Approaches**

Other alternatives for iterating over arrays include:

* Using Array.prototype.forEach(): Similar to jQuery's `.each()` method, but part of the standard JavaScript API.
* Using a while loop: Another traditional approach that can be used for iteration.
* Using a for-of loop (ES6+): A newer syntax that allows iterating over arrays and other iterables without needing an index variable.

These alternatives can provide different performance characteristics and trade-offs compared to jQuery's `.each()` method or traditional `for` loops.

jQuery Each vs For (version: 3) Benchmark.js

Comparing performance of: `jQuery Each vs For`

Created: 8 years ago by: Registered User

Go to the latest result

jQuery Each

For

Historical Performance Data aggregated from 12 community runs

Desktop Results:

Chrome 12 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 Each vs For (version: 3) Benchmark.js

Comparing performance of: jQuery Each vs For

Created: 8 years ago by: Registered User

Go to the latest result

jQuery Each

For

Historical Performance Data aggregated from 12 community runs

Desktop Results:

Chrome 12 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Comparing performance of: `jQuery Each vs For`