Benchmark: lodash forEach vs for i loop1212

HTML Preparation code:

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

Script Preparation code:

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

Tests:

lodash.forEach
var count = 0; for (let v = 0; v < values.length; v++) { if (values[v].a !== null) { count++; } }
native
var count = 0; for (let v of values) { if (v.a !== null) { count++; } }

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 29 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested.

**Benchmark Overview**

MeasureThat.net is testing two approaches for iterating over an array: using the `forEach` method of the Lodash library, and using a traditional `for` loop with an index variable (`v`).

The benchmark is comparing the performance of these two approaches on a specific use case: counting the number of objects in an array that have a non-null value in their `a` property.

**Options Being Compared**

1. **Lodash `forEach`**: This approach uses the `forEach` method of Lodash to iterate over the array, executing a callback function for each element.
2. **Traditional `for` loop with index variable (`v`)**: This approach uses a traditional `for` loop to iterate over the array, using an index variable (`v`) to access each element.

**Pros and Cons**

1. **Lodash `forEach`**:
	* Pros: concise and expressive code, easy to read and maintain.
	* Cons: may incur overhead due to function call and stack management.
2. **Traditional `for` loop with index variable (`v`)**:
	* Pros: lightweight and efficient, avoids potential overhead of Lodash's function call mechanism.
	* Cons: requires manual incrementation of the index variable, can be less readable for complex loops.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for common tasks, such as array manipulation, object transformation, and more. The `forEach` method in Lodash is used to iterate over an array, executing a callback function for each element.

In this benchmark, Lodash's `forEach` method is used to iterate over the array and execute a callback function for each element that has a non-null value in its `a` property.

**Special JS Feature/Syntax: None**

There are no special JavaScript features or syntax used in this benchmark. The code is standard ECMAScript and does not utilize any advanced features like async/await, promises, or modern array methods (e.g., `for...of`).

**Other Alternatives**

If you want to explore alternative approaches, here are a few options:

1. **Native `for...of` loop**: You could use a native `for...of` loop to iterate over the array, which is similar to the traditional `for` loop with an index variable.
2. **Array.prototype.forEach()**: In modern JavaScript, you can use the `forEach()` method on arrays as a shorthand for iterating over them using a callback function.
3. **Other libraries or frameworks**: Depending on your specific use case, you might consider using other libraries or frameworks that provide optimized array iteration mechanisms, such as React's `useCallback` and `useMemo`.

Keep in mind that the performance differences between these approaches may be relatively small, and the choice ultimately depends on factors like code readability, maintainability, and performance requirements.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36

Browser/OS: Chrome 91 on Windows

View result in a separate tab

Test name	Executions per second
lodash.forEach	1746202.8 Ops/sec
native	9677618.0 Ops/sec

Related benchmarks:

lodash forEach vs for i loop1212 (version: 0)

Comparing performance of: lodash.forEach vs native

Created: 5 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 29 days ago):