Benchmark: _.isEmpty vs 3 array.length 3

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

window.obj = {
a: [],
b: [],
c: [{id: '7'},{id: '8'},{id: '9'}],
};

Tests:

_.isEmpty
_.isEmpty(window.obj);
Object.keys().length
window.obj.a.length === 0 && window.obj.b.length === 0 && window.obj.c.length === 0;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
Object.keys().length

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.

**Overview of the Benchmark**

The provided JSON represents a JavaScript microbenchmarking test created on MeasureThat.net. The benchmark tests two different approaches to check if an array or object is empty: using the Lodash library's `isEmpty` function and a native JavaScript approach using `Object.keys().length`.

**What is being tested?**

In this benchmark, we're comparing:

1. **Lodash `isEmpty`**: This function checks if an object or array has any properties or elements. It returns `true` if the object or array is empty, and `false` otherwise.
2. **Native JavaScript approach using `Object.keys().length`**: This method checks if an object's keys are empty by counting the number of keys in the object using the `Object.keys()` method. If the length of the keys array is 0, it assumes the object is empty.

**Options compared**

The two options being compared are:

* Lodash `isEmpty` (library-based approach)
* Native JavaScript approach using `Object.keys().length` (language-based approach)

**Pros and Cons**

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

### Lodash `isEmpty`

Pros:

* **Faster execution**: In general, checking if an object or array is empty with `isEmpty` can be faster since it uses a specialized algorithm that takes into account various types of objects.
* **Less error-prone**: `isEmpty` handles edge cases like null and undefined inputs more robustly than the native JavaScript approach.

Cons:

* **Additional dependency**: Using Lodash introduces an additional library dependency, which may not be desirable for all projects or environments.
* **Slower cold-start**: Loading Lodash can introduce a slight delay in execution due to the overhead of loading an external library.

### Native JavaScript approach using `Object.keys().length`

Pros:

* **No additional dependencies**: This method doesn't require any external libraries, making it suitable for projects with strict dependency constraints.
* **Fast cold-start**: The native JavaScript implementation has no overhead from loading a separate library.

Cons:

* **More complex and error-prone**: Implementing this approach requires manual handling of edge cases like null and undefined inputs.
* **Slower execution**: In some scenarios, checking if an object or array is empty using `Object.keys().length` can be slower due to the overhead of calling a method on every iteration.

**Library used**

In this benchmark, the Lodash library is used for its `isEmpty` function. Lodash is a popular JavaScript utility library that provides various functions for working with data structures like arrays and objects.

**Special JS feature or syntax**

There's no mention of special JavaScript features or syntax in this benchmark.

**Other alternatives**

If you're looking for alternative approaches to checking if an array or object is empty, here are some options:

* Using `Array.prototype.every()` and `Array.prototype.some()`: These methods can be used to check if all elements in an array pass a test (e.g., being empty) or at least one element fails the test.
* Using `Set` and `SizeOf`: Checking if an object's keys are equal to a Set of its original keys using `SizeOf` library function.
* Implementing a custom recursive function: You can write a recursive function that checks if an object or array is empty by iterating over its properties or elements.

Keep in mind that the best approach depends on your specific use case, performance requirements, and code style preferences.

Related benchmarks:

_.isEmpty vs 3 array.length 3 (version: 0)

Comparing performance of: _.isEmpty vs Object.keys().length

Created: 3 years ago by: Guest

Jump to the latest result

_.isEmpty

Object.keys().length

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):