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

Latest run results:

No previous run results

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

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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.

Related benchmarks:

lodash forEach vs for i loop1212 (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>

Fastest: N/A

Slowest: N/A

No previous run results

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