Benchmark: Lodash vs Array (lodash 4.17.5) arr(5000)

HTML Preparation code:

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

Script Preparation code:

function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}

var arr = [];
for(var i = 0; i < 5000; i++){
  arr.push({value:getRandomInt(100)});
}

Tests:

lodash isArray
_.isArray(arr);
Array isArray
Array.isArray(...arr)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash isArray
Array isArray

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/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
lodash isArray	94534728.0 Ops/sec
Array isArray	407615.4 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 benchmark and its options.

**Benchmark Overview**

The benchmark tests the performance of two approaches to check if an array is an array:

1. Using Lodash (`_.isArray(arr);`)
2. Using the native `Array.isArray()` method (`Array.isArray(...arr)`)

**Lodash Approach (`_.isArray(arr);`)**

* **Library:** Lodash (a popular utility library for JavaScript)
* **Purpose:** Provides various helper functions to make common programming tasks easier.
* **Pros:**
	+ Fast and efficient, thanks to Lodash's caching mechanism.
	+ Can be useful in larger codebases where array checks are a common occurrence.
* **Cons:**
	+ Adds overhead due to the library's execution time.
	+ Requires an additional dependency (Lodash).
* **Special Consideration:** The `_.isArray()` method uses a cached version of the function, which can improve performance by reusing the same cache for subsequent calls. However, this comes at the cost of requiring Lodash.

**Native Approach (`Array.isArray(...arr)`)**

* **Pros:**
	+ Lightweight and doesn't add any additional overhead.
	+ Built-in method that's native to JavaScript engines.
* **Cons:**
	+ May not be as fast as the Lodash approach due to its simplicity.
	+ No caching mechanism, so each call will execute from scratch.

**Comparison**

The benchmark is designed to compare the performance of these two approaches. The test case `_.isArray(arr);` uses Lodash's implementation, while `Array.isArray(...arr)` uses the native method. By comparing the execution times and number of executions per second, we can see which approach is faster and more efficient.

**Other Alternatives**

If you need to check if an object is an array, but don't want to use Lodash or the native `Array.isArray()` method, you could consider:

1. Using a simple type check with `typeof` operator (e.g., `if (obj instanceof Array) { ... }`)
2. Implementing your own array check function
3. Using a different library that provides an alternative array checking implementation

However, these alternatives might not be as efficient or reliable as the Lodash and native approaches.

**Conclusion**

The benchmark highlights the importance of performance and optimization in JavaScript development. By using a library like Lodash, you can achieve faster execution times for common operations. However, this comes at the cost of adding additional dependencies and overhead. The native `Array.isArray()` method provides a lightweight alternative, but may not be as efficient. Ultimately, the choice depends on your specific use case, performance requirements, and personal preference.

Related benchmarks:

Lodash vs Array (lodash 4.17.5) arr(5000) (version: 0)

Comparing performance of: lodash isArray vs Array isArray

Created: 5 years ago by: Guest

Jump to the latest result

lodash isArray

Array isArray

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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