Benchmark: under test - MeasureThat.net

HTML Preparation code:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/underscore.js/1.13.3/underscore.min.js"></script>

Script Preparation code:


// Populate the base array
var arr = [];
for (var i = 0; i < 1000; i++) {
  arr[i] = i;
}

function fn(a) {
  return a * 2 * 5;
}

Tests:

under
_.forEach(arr,fn)
jquery
$.each(fn);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
under
jquery

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided Benchmark Definition JSON and individual test cases to understand what is being tested.

**Benchmark Definition**

The Benchmark Definition represents a JavaScript microbenchmark that tests the execution time of a specific piece of code. The definition includes:

1. **Script Preparation Code**: This section provides the initial setup for the benchmark, including variables and functions that will be used in the test.
2. **Html Preparation Code**: These scripts are loaded to prepare the environment for the benchmark. In this case, jQuery (a popular JavaScript library for DOM manipulation) and Underscore.js (a utility library) are included.

The Benchmark Definition itself is a string representing the code that will be tested. The two test cases provided compare:

1. **_.forEach(arr,fn)**: This line uses Underscore.js's `forEach` method to iterate over an array (`arr`) and call a function (`fn`) on each element.
2. **$.each(fn);**: This line uses jQuery's `each` method to achieve the same result as above.

**Individual Test Cases**

Each test case represents a specific variation of the benchmark being tested. The two test cases provided are:

1. **_.forEach(arr,fn)**: This test case measures the execution time of using Underscore.js's `forEach` method.
2. **$.each(fn);**: This test case measures the execution time of using jQuery's `each` method.

**Options Compared**

The main difference between these two approaches is:

* **DOM Manipulation**: Both methods require iterating over the array, but jQuery's `each` method also modifies the original data structure (by appending/inserting elements to the DOM), whereas Underscore.js's `forEach` method does not.
* **Library Complexity**: jQuery and Underscore.js are two separate libraries with different APIs and use cases.

**Pros and Cons**

Here are some pros and cons of each approach:

* **_.forEach(arr,fn)**:
	+ Pros: Does not modify the original data structure, faster execution time due to fewer DOM operations.
	+ Cons: Requires Underscore.js library, may require more setup code for array preparation.
* **$.each(fn);**:
	+ Pros: Easier to understand and use, especially for developers familiar with jQuery.
	+ Cons: Modifies the original data structure, potentially slower execution time due to DOM operations.

**Other Considerations**

When choosing between these approaches, consider the specific requirements of your project:

* If you need to modify the original data structure, jQuery's `each` method might be a better choice.
* If speed and minimizing DOM operations are crucial, Underscore.js's `forEach` method might be a better option.

**Library and Syntax**

In this benchmark, we're using two JavaScript libraries: jQuery and Underscore.js. Both libraries provide utility functions for common tasks, but have different APIs and use cases.

Underscore.js is often used for functional programming and provides a simple way to iterate over arrays using `forEach`, `map`, `filter`, etc.

jQuery is primarily used for DOM manipulation and event handling. While it does provide some utility functions like `each`, its main focus is on working with the Document Object Model (DOM).

The syntax used in this benchmark is standard JavaScript, with no special features or syntax being tested.

**Alternatives**

If you're interested in alternative libraries or methods for iterating over arrays, consider:

* Vanilla JavaScript: You can use traditional `for` loops or `forEach` without any external library.
* Lodash (a popular utility library similar to Underscore.js): Offers a wide range of functions for array manipulation and other tasks.

Keep in mind that the choice of library or method ultimately depends on your project's specific requirements, performance needs, and personal preference.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.66 Safari/537.36

Browser/OS: Chrome 101 on Windows

View result in a separate tab

Test name	Executions per second
under	375099.9 Ops/sec
jquery	890017.2 Ops/sec

Related benchmarks:

under test (version: 0)

under

Comparing performance of: under vs jquery

Created: 2 years ago by: Guest

Jump to the latest result

under

jquery

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):