Benchmark: Lodash _.forEach vs Object forEach

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.min.js'></script>

Script Preparation code:

var value = [{a: 30310}, {b: 100303}, {c: 3040494}, {d: 304045684}, {e: 38846325040494}]

Tests:

Lodash _.forEach()
_.forEach(value, function(v,i) {})
Native
value.forEach(function(v,i) {})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash _.forEach()
Native

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 benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares the performance of two approaches:

1. **Native `forEach`**: The native `forEach` method built into JavaScript, which is used to iterate over an array or iterable object without explicitly iterating through its elements.
2. **Lodash _.forEach`**: A function from the Lodash library, a popular utility library for JavaScript that provides a collection of functions for various tasks.

**Benchmark Script**

The script preparation code defines a simple JavaScript array `value` with five elements, each containing an object with a single property (e.g., `{a: 30310}`). This array will be used as the input data for both benchmark tests.

**Benchmark Preparation Code**

The HTML preparation code includes a link to load the Lodash library in the browser. This is necessary because the Lodash _.forEach` function relies on this external library.

**Comparison of Approaches**

Both approaches iterate over the `value` array, but they do so differently:

* **Native `forEach`**: The native `forEach` method executes a callback function for each element in the array, providing both the value (`v`) and index (`i`) as arguments. This approach is lightweight and has good performance characteristics.
* **Lodash _.forEach`**: Lodash provides its own implementation of the `forEach` method, which also iterates over an array or iterable object. The main difference is that Lodash's implementation may have additional overhead due to its library functionality.

**Pros and Cons**

* **Native `forEach`**:
	+ Pros: Lightweight, good performance, built-in JavaScript feature.
	+ Cons: May not be as flexible as other libraries (e.g., Lodash).
* **Lodash _.forEach`**:
	+ Pros: More flexible, might provide additional utility functions through the library.
	+ Cons: Adds overhead due to the library, may have slower performance compared to native `forEach`.

**Library: Lodash**

The Lodash library is a popular JavaScript utility library that provides a collection of functions for various tasks, such as:

* Iteration and looping (`forEach`, `map`, `reduce`)
* String manipulation and formatting
* Array and object manipulation
* Event handling and debouncing

Lodash's purpose is to provide a set of reusable functions that can simplify development and make code more efficient.

**JavaScript Features/ Syntax**

There are no special JavaScript features or syntax mentioned in this benchmark. The focus is solely on the performance comparison between native `forEach` and Lodash's implementation.

**Alternatives**

If you're interested in exploring alternative approaches to testing performance, consider:

* Using a different array or iterable object (e.g., a custom class)
* Adding more elements to the input data
* Varying the callback function signature or behavior
* Comparing against other libraries or frameworks (e.g., React's `forEach`)

Keep in mind that these alternatives might alter the benchmark results or require additional modifications to the script and preparation code.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0

Browser/OS: Firefox 63 on Windows 7

View result in a separate tab

Test name	Executions per second
Lodash _.forEach()	8869900.0 Ops/sec
Native	24894990.0 Ops/sec

Related benchmarks:

Lodash _.forEach vs Object forEach (version: 0)

Comparing performance of: Lodash _.forEach() vs Native

Created: 6 years ago by: Guest

Jump to the latest result

Lodash _.forEach()

Native

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):