Benchmark: lodash vs for-of vs forEach3

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js"></script>

Script Preparation code:

var arr = [];
for (let i = 1; i<100000; i++) {arr.push(i)}

Tests:

lodash.forEach
_.forEach(arr, function(v) {v+v})
native for-of
for (const a of arr) {a+a}
native for
for (let i = 0; i < arr.length; i++) { arr[i] + arr[i] }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.forEach
native for-of
native 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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Windows

View result in a separate tab

Test name	Executions per second
lodash.forEach	1687.0 Ops/sec
native for-of	8141.1 Ops/sec
native for	2902.6 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 files and explain what's being tested.

**Benchmark Definition**
The `Benchmark Definition` represents a JavaScript function or block of code that is being tested for performance. In this case, there are three test cases:

1. `_.forEach(arr, function(v) {v+v})`: This is a benchmark definition using the Lodash library. It defines an array `arr` and uses the `forEach` method to iterate over it, performing a simple operation on each element (`v+v`).
2. `for (const a of arr) {a+a}`: This is a native JavaScript test case that uses the `for-of` loop syntax to iterate over the same array `arr`. The loop body performs the same operation as before (`a+a`).
3. `for (let i = 0; i < arr.length; i++) { arr[i] + arr[i] }`: This is another native JavaScript test case that uses a traditional `for` loop to iterate over the array `arr`. The loop body performs the same operation as before (`arr[i] + arr[i`).

**Library: Lodash**
The `_.forEach` method is part of the Lodash library, which provides a collection of high-order functions for functional programming. In this case, it's used to iterate over an array and perform a simple operation on each element.

**Pros and Cons**

* **Lodash `.forEach`:** This approach has some advantages:
	+ It allows for more concise code and reduced boilerplate.
	+ Lodash provides additional functionality and tools for working with arrays.
* However, it also has some disadvantages:
	+ It requires including an external library (in this case, Lodash).
	+ The overhead of using a library might introduce additional latency.

* **Native `for-of`:** This approach is simple, lightweight, and doesn't require any external libraries. However:
	+ It's less concise than the Lodash version.
	+ It requires more manual management of loop variables and iterations.

* **Native `for` loop:** Similar to `for-of`, this approach is also lightweight but:
	+ Even more verbose than `for-of`.
	+ Requires more manual iteration management.

**Considerations**

When comparing these approaches, it's essential to consider the context in which they'll be used. For example:

* If performance-critical code needs to iterate over large arrays, the native `for-of` or `for` loop might be a better choice.
* If concise code is more important than performance, Lodash `.forEach` could be a better option.

**Other Alternatives**
If you're interested in exploring other alternatives, here are some options:

* Other iterative methods: `forEach`, `map`, `reduce`, or even `filter`.
* Different array data structures (e.g., `Set`, `Map`, `ArrayBuffer`) that might affect performance.
* Optimizations for specific JavaScript engines or browsers.

Overall, the choice of iteration method depends on the specific requirements and constraints of your project.

Related benchmarks:

lodash vs for-of vs forEach3 (version: 0)

Comparing performance of: lodash.forEach vs native for-of vs native for

Created: 6 years ago by: Guest

Jump to the latest result

lodash.forEach

native for-of

native for

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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