Benchmark: Lodash.js vs Native ES5 vs instanceof isArray

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

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

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native
Lodash.js
instanceof

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):

LLMs can make mistakes. Check important info.

I'll provide an explanation of the provided JSON, describing what is tested, compared options, pros and cons, and other considerations.

**Benchmark Definition**

The provided JSON defines a benchmark with three test cases:

1. `Array.isArray(arr);`: Tests the native JavaScript method to check if an array.
2. `_isArray(arr);`: Tests the Lodash.js library's implementation of `isArray()` for arrays.
3. `arr instanceof Array;`: Tests the `instanceof` operator, which checks if an object is an instance of a particular constructor.

**Options Compared**

The options being compared are:

* Native JavaScript method (`Array.isArray(arr)`): This is the built-in JavaScript function to check if an array.
* Lodash.js library's implementation (`_.isArray(arr)`): The `_.isArray()` function from the popular utility library, Lodash.js.
* `instanceof` operator (`arr instanceof Array`): A part of the JavaScript language itself, which checks if an object is an instance of a particular constructor.

**Pros and Cons**

Here are some pros and cons for each option:

* **Native JavaScript method (`Array.isArray(arr)`)**:
	+ Pros: Built-in function, fast, easy to use.
	+ Cons: May not be as explicit or clear as other options, especially for developers not familiar with the native implementation.
* **Lodash.js library's implementation (`_.isArray(arr)`)**:
	+ Pros: More explicit and clear than the native method, provides additional utility functions like `_.isPlainObject()`, etc. Highly maintainable code. Easy to use.
	+ Cons: Requires an external library, may not be suitable for all JavaScript environments (e.g., some older browsers).
* **`instanceof` operator (`arr instanceof Array`)**:
	+ Pros: Most explicit and clear way to check if an object is an instance of a particular constructor. Native JavaScript functionality.
	+ Cons: May not be as readable or intuitive for developers unfamiliar with the `instanceof` operator.

**Library and Syntax**

The test case uses the Lodash.js library, which provides utility functions like `_isArray()`. This library is widely used and well-maintained, making it a good choice for many JavaScript projects. The syntax used here (`_.isArray(arr)`) is specific to Lodash.js and may require some familiarity with the library.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark, as all three options rely on well-established JavaScript language constructs (native methods, `instanceof` operator, etc.).

**Other Alternatives**

If you're looking for alternatives to Lodash.js, there are several other popular libraries that provide similar utility functions:

* **Underscore.js**: Similar to Lodash.js but with a slightly different API.
* **Moment.js**: A library for working with dates and times, not directly related to the array check functionality.
* **Ramda.js**: A functional programming library that includes an `isArray` function.

Keep in mind that these alternatives may have different APIs or features, so it's essential to evaluate their suitability based on your specific needs.

Related benchmarks:

Lodash.js vs Native ES5 vs instanceof isArray (version: 0)

Comparing performance of: Native vs Lodash.js vs instanceof

Created: 6 years ago by: Guest

Jump to the latest result

Native

Lodash.js

instanceof

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):