Benchmark: _.isEmpty() vs null check undefined check and Object.keys

HTML Preparation code:

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

Script Preparation code:

window.a = {};
window.b = null;
window.c = undefined;
window.d = { a: 1 };
window.e = { a: { b: 1 } };

Tests:

Object.keys
function func(val) { return val == null || (typeof val == 'object' && Object.keys(val) == 0) } func(window.a); func(window.b); func(window.c); func(window.d); func(window.e);
_.isEmpty
function func(val) { return _.isEmpty(val); } func(window.a); func(window.b); func(window.c); func(window.d); func(window.e);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.keys
_.isEmpty

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided benchmark JSON and explain what's being tested.

**Overview**

The benchmark is designed to compare three approaches to check if an object is empty:

1. `_.isEmpty()` from the Lodash library
2. Using the `Object.keys()` method with a condition to check if the object has zero keys
3. A custom implementation that checks for null, undefined, and empty objects

**Libraries used**

* **Lodash**: A popular JavaScript utility library that provides various functions, including `_.isEmpty()`. The Lodash library is included in the benchmark via an external script tag.

**Custom implementations**

The custom implementations are defined in the `Script Preparation Code` section of the benchmark. These implementations check for null, undefined, and empty objects using a combination of simple conditional checks.

*   `window.a`: An empty object with no properties.
*   `window.b`: A null value.
*   `window.c`: An undefined value.
*   `window.d`: An object with one property (`a: 1`).
*   `window.e`: An object with multiple nested properties (e.g., `{ a: { b: 1 } }`).

**Options compared**

The benchmark compares three approaches:

1.  `_.isEmpty()`: This is the Lodash implementation that checks if an object has zero keys.
2.  `Object.keys()`: This method returns an array of object properties, and the custom implementation checks if this array has a length of zero to determine if the object is empty.
3.  Custom Implementation: The benchmark also includes a custom implementation that manually checks for null, undefined, and empty objects.

**Pros and Cons**

Here are some pros and cons of each approach:

*   **_.isEmpty()**: Pros:
    *   Concise and readable code.
    *   Easy to implement using Lodash.
    Cons:
    *   May be slower than custom implementations due to the overhead of using a library function.
*   `Object.keys()`: Pros:
    *   Fast and efficient.
    Cons:
    *   Requires manual checks for object emptiness, which can be less readable.
*   Custom Implementation: Pros:
    *   Can be optimized for performance.
    Cons:
    *   More code to write and maintain.

**Special JavaScript features or syntax**

There are no special JavaScript features or syntax used in this benchmark. The focus is on the implementation details of each approach.

**Other alternatives**

Here are some alternative approaches that could have been included in this benchmark:

*   Using `Object.isEmpty()` (not a standard method, but available in some browsers): This method would return true if the object has zero properties.
*   Using `for...in` loop to check for empty objects: This approach involves iterating over the object's properties and checking if any of them are undefined.

These alternative approaches could have been explored to provide more insight into performance optimizations or edge cases.

Related benchmarks:

_.isEmpty() vs null check undefined check and Object.keys (version: 0)

Comparing performance of: Object.keys vs _.isEmpty

Created: 3 years ago by: Guest

Jump to the latest result

Object.keys

_.isEmpty

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):