Benchmark: Lodash.js vs Native isArray (2023)

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>

Script Preparation code:

var arr = ['12', 'caca', 'maca', 'benchmark'];

Tests:

Native
Array.isArray(arr);
Lodash.js filter
_.isArray(arr);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native
Lodash.js filter

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; rv:133.0) Gecko/20100101 Firefox/133.0

Browser/OS: Firefox 133 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
Native	270325056.0 Ops/sec
Lodash.js filter	275146624.0 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 benchmark and explain what's being tested.

**Benchmark Description**

The benchmark compares the performance of two approaches: using the native `Array.isArray()` method (in JavaScript) and using the Lodash library's `isArray()` function to check if an array is present in a given JavaScript array.

**Options Compared**

The two options being compared are:

1. **Native `Array.isArray()`**: This method is part of the ECMAScript standard and is implemented natively by most modern browsers and JavaScript engines.
2. **Lodash library's `isArray()` function**: Lodash is a popular utility library for JavaScript that provides various helper functions, including one to check if an array is present in a given context.

**Pros and Cons**

**Native `Array.isArray()`**:

* Pros:
	+ Extremely fast, as it's implemented natively by the browser.
	+ Low memory overhead, as it doesn't require loading an external library.
* Cons:
	+ May not be supported in older browsers or JavaScript engines that don't implement this method.
	+ Can lead to issues with array prototype manipulation and other edge cases.

**Lodash library's `isArray()` function**:

* Pros:
	+ More readable code, as it clearly conveys the intent of checking if an array is present.
	+ Works in older browsers and JavaScript engines that don't support native `Array.isArray()`.
* Cons:
	+ Slower than native implementation due to external library overhead.
	+ Additional memory usage due to loading the Lodash library.

**Library: Lodash**

Lodash (Licensed under the MIT License) is a popular utility library for JavaScript that provides various helper functions, including ones for:

* Iteration and manipulation of data structures
* String and array manipulation
* Utility functions for common tasks

The `isArray()` function in Lodash checks if an object is an array and returns a boolean value indicating its presence. This function can be useful when working with arrays or other data structures that may not conform to the traditional JavaScript array prototype.

**Special JS Feature/Syntax: None**

There are no special JavaScript features or syntax used in this benchmark, as it only involves standard JavaScript methods and functions.

**Other Alternatives**

If you need to check if an object is an array in a different way, other alternatives might include:

* Using the `typeof` operator with `array` as the type check: `typeof x === 'object' && Array.isArray(x)`
* Creating a custom function using the `instanceof` operator and checking for the correct prototype chain
* Using a third-party library like underscore.js (another popular utility library) or Moment.js (for date manipulation)

Keep in mind that these alternatives may have different trade-offs in terms of performance, readability, and maintainability.

Related benchmarks:

Lodash.js vs Native isArray (2023) (version: 0)

Comparing performance of: Native vs Lodash.js filter

Created: 2 years ago by: Guest

Jump to the latest result

Native

Lodash.js filter

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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