Benchmark: lodash.each vs Object.forEach vs Native for

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>

Script Preparation code:

var value = [{a: 30310}, {b: 100303}, {c: 3040494}]

Tests:

lodash.each
_.each(value, function(v,i) {})
native
value.forEach(function(v,i) {})
native for
for(let i = 0; i < value.length; ++i){}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.each
native
native for

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the details of this JavaScript microbenchmark.

**Benchmark Overview**

The benchmark measures the performance difference between three approaches: using Lodash's `each` function, utilizing the native `forEach` method on arrays, and implementing a traditional `for` loop to iterate over an array. The goal is to determine which approach is the fastest.

**Options Compared**

There are three options being compared:

1. **Lodash's `each` function**: A utility function from the Lodash library that provides a way to iterate over an array.
2. **Native `forEach` method on arrays**: A built-in method in JavaScript that allows iterating over an array using a callback function.
3. **Traditional `for` loop**: A manual iteration approach using a traditional `for` loop.

**Pros and Cons of Each Approach**

1. **Lodash's `each` function**:
	* Pros: Provides a concise and readable way to iterate over arrays, especially when dealing with complex logic. Lodash is a popular library with extensive documentation.
	* Cons: Requires including the Lodash library in the project, which may increase bundle size. The performance overhead of using a library can be significant if not properly optimized.
2. **Native `forEach` method on arrays**:
	* Pros: Fast and efficient, as it's implemented in native JavaScript code. It also provides good cache locality, making it suitable for large datasets.
	* Cons: May require more boilerplate code to set up the iteration logic, especially when dealing with complex data structures.
3. **Traditional `for` loop**:
	* Pros: Fast and lightweight, as it's implemented in native JavaScript code without any overhead from libraries. It also provides full control over the iteration logic.
	* Cons: Can be verbose and difficult to read, especially for large datasets or complex iteration logic.

**Library Used**

In this benchmark, Lodash is used, which provides a convenient way to iterate over arrays with its `each` function.

**Special JavaScript Features/Syntax**

None of the benchmark test cases utilize any special JavaScript features or syntax that would affect their performance differently. The focus is on comparing the three iteration approaches.

**Alternative Approaches**

Other alternatives for iterating over arrays in JavaScript include:

* `forEach()`: A method similar to `forEach`, but returns a value (if provided) instead of nothing.
* `map()` and `filter()`: Methods that create new arrays with transformed or filtered elements, respectively.
* `reduce()`: A method that applies a reduction function to each element in an array.
* Using `Promise.all()` with a map or forEach callback.

Each of these approaches has its own trade-offs and use cases. The benchmark highlights the performance difference between using libraries like Lodash and implementing manual iteration logic, as well as the benefits of native methods versus traditional loops.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36

Browser/OS: Chrome 78 on Windows

View result in a separate tab

Test name	Executions per second
lodash.each	3383911.0 Ops/sec
native	11975683.0 Ops/sec
native for	3029730.5 Ops/sec

Related benchmarks:

lodash.each vs Object.forEach vs Native for (version: 0)

Comparing performance of: lodash.each vs native vs native for

Created: 5 years ago by: Guest

Jump to the latest result

lodash.each

native

native for

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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