Benchmark: Array.prototype.forEach vs _.each

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>

Tests:

Array.prototype.forEach
var params = [ "hello", true, 7 ]; var index = 0; params.forEach(param => index++);
lodash each
var params = [ "hello", true, 7 ]; var index = 0; _.each(params, param => index++);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.forEach
lodash each

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Browser/OS: Chrome 127 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array.prototype.forEach	103297760.0 Ops/sec
lodash each	9193175.0 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.

**What is being tested?**

The benchmark compares two approaches to iterate over an array:

1. `Array.prototype.forEach` (built-in JavaScript method)
2. `_`.each (method from the Lodash library)

The test uses a simple example with three elements in the array: `"hello"`, `true`, and `7`.

**Options compared**

Two options are being compared:

* **Built-in JavaScript**: `Array.prototype.forEach`
* **Lodash library**: `_`.each

**Pros and Cons of each approach:**

**Built-in JavaScript (Array.prototype.forEach)**

Pros:

* Fast and lightweight
* Native support in all modern browsers
* Easy to use and understand for most developers

Cons:

* May not be as efficient as other methods in certain scenarios
* Can lead to callback hell if not used carefully

**Lodash library (_).each**

Pros:

* More flexible and powerful than the built-in `forEach` method
* Supports additional features like callback functions, iterators, and more
* Well-maintained and widely used library

Cons:

* Requires an external dependency (the Lodash library)
* May have a slightly higher overhead due to the additional layer of abstraction
* Can be less intuitive for developers who are not familiar with the library

**Library (Lodash) purpose**

The Lodash library is a popular JavaScript utility belt that provides a wide range of functions and methods for various tasks, such as:

* Iteration and looping (`_.each`, `forEach`)
* Array manipulation (`map`, `filter`, `reduce`)
* String and number manipulation (`toString`, `parseInt`)
* Object and function manipulation (`assign`, `merge`)
* And many more...

**Special JS feature or syntax**

There are no special JavaScript features or syntax mentioned in this benchmark. The code uses standard JavaScript syntax and the Lodash library's method name.

**Other alternatives**

If you're looking for alternative methods to iterate over an array, some other options include:

* `for` loop: a traditional loop that uses an index variable
* `Array.prototype.map()`: a method that creates a new array with transformed elements (not suitable for modifying the original array)
* `Array.prototype.reduce()`: a method that applies a function to each element in the array and accumulates a result

Keep in mind that the choice of iteration method depends on your specific use case, performance requirements, and personal preference.

Related benchmarks:

Array.prototype.forEach vs _.each (version: 1)

Compare the new ES6 spread operator with the traditional concat() method

Comparing performance of: Array.prototype.forEach vs lodash each

Created: 8 years ago by: Registered User

Jump to the latest result

Array.prototype.forEach

lodash each

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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