Benchmark: Array.prototype.forEach vs Lodash forEach

HTML Preparation code:

<script src="lodash.js"></script>

Script Preparation code:

var array = [...Array(100000).keys()];

Tests:

Array.prototype.forEach
array.forEach(n => n*2)
Lodash forEach
_.forEach(array,n => n*2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.forEach
Lodash forEach

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser/OS: Chrome 129 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array.prototype.forEach	24176.9 Ops/sec
Lodash forEach	2341.4 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the explanation into sections to help you understand what's being tested, the options compared, their pros and cons, and other considerations.

**What is being tested?**

The benchmark measures the performance difference between using the built-in `Array.prototype.forEach` method in JavaScript (specifically, iterating over an array and multiplying each element by 2) versus using the `_.forEach` function from the Lodash library for the same operation.

In other words, the test checks how efficient the two approaches are when executing a similar task: iterating over an array and performing a calculation on each element.

**Options compared**

There are two main options being compared:

1. **Array.prototype.forEach**: This is a built-in JavaScript method that iterates over an array and executes a callback function for each element.
2. **Lodash forEach**: This is a utility function from the Lodash library that also iterates over an array and executes a callback function for each element.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **Array.prototype.forEach**:
	* Pros: Built-in method, likely to be optimized by JavaScript engines.
	* Cons: May not be as performant as native code or specialized libraries like Lodash.
2. **Lodash forEach**:
	* Pros: Optimized for performance, can handle larger datasets and more complex iterations.
	* Cons: Requires an additional library dependency (Lodash) and may have overhead due to the abstraction layer.

**Other considerations**

The test also considers factors such as:

* **Browser and device**: The benchmark is run on a Chrome browser on a desktop platform with macOS 10.15.7, which might affect performance.
* **Library version**: Lodash is used in version X.Y.Z, but it's not specified.
* **Native code vs. JavaScript**: The test focuses on native code (Array.prototype.forEach) versus JavaScript libraries (Lodash forEach).
* **Microbenchmarking**: This test is designed to measure the performance of specific microtasks, which can be more relevant for optimizing performance-critical parts of code.

**Library and syntax**

The Lodash library is a popular utility library that provides a set of functions for common tasks, such as array manipulation, string formatting, and more. In this case, the `_.forEach` function is used to iterate over an array and execute a callback function for each element.

There's no special JavaScript feature or syntax being tested in this benchmark, just standard JavaScript methods and libraries.

**Alternatives**

If you're looking for alternative approaches, consider:

* Using native code (e.g., C++ or Rust) for performance-critical parts of your application.
* Leveraging other specialized libraries or frameworks for specific tasks, like React or Angular for client-side rendering.
* Optimizing JavaScript engine-specific features, such as WebAssembly or SIMD instructions.

Keep in mind that the best approach depends on the specific requirements and constraints of your project.

Related benchmarks:

Array.prototype.forEach vs Lodash forEach (version: 0)

Comparing performance of: Array.prototype.forEach vs Lodash forEach

Created: 7 years ago by: Guest

Jump to the latest result

Array.prototype.forEach

Lodash forEach

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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