Benchmark: Lodash isPlainObject vs JS Constructor Check (with more cases)

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.20/lodash.min.js"></script>

Script Preparation code:

var sampleObject = {
        "id": "0001",
        "type": "donut",
        "name": "Cake",
        "ppu": 0.55
    };
var sampleObject2 = Object.create(null);
var sampleObject3 = null;
var sampleObject4 = 100;

class Foo {
  constructor() {
    this.a = 1;
  }
}

var sampleObject5 = new Foo();

function isObject(any) {
return
(
        any != null &&
        (any.constructor === Object ||
            (typeof any === 'object' && Object.getPrototypeOf(any) === null))
    )
}

Tests:

Lodash isPlainObject
_.isPlainObject(sampleObject); _.isPlainObject(sampleObject2); _.isPlainObject(sampleObject3); _.isPlainObject(sampleObject4); _.isPlainObject(sampleObject5);
JS Type Check
isObject(sampleObject); isObject(sampleObject2); isObject(sampleObject3); isObject(sampleObject4); isObject(sampleObject5);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash isPlainObject
JS Type Check

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 and explain what's being tested.

**Benchmark Overview**

The benchmark measures the performance of two approaches to check if an object is plain (i.e., not an instance of a constructor function). The first approach uses Lodash's `isPlainObject` function, while the second approach defines a custom `isObject` function.

**Lodash's `isPlainObject` Function**

*   Purpose: To determine if an object is plain, which means it has no prototype chain.
*   Library: Lodash, a popular JavaScript utility library.
*   Pros:
    *   Well-tested and widely used codebase.
    *   Provides a clear and concise API for checking object types.

Cons:

*   Requires loading the entire Lodash library, which may not be desirable for small applications or those with tight performance requirements.
    *   May incur additional overhead due to the use of a third-party library.

**Custom `isObject` Function**

*   Purpose: To manually check if an object has no prototype chain (i.e., it's plain).
*   Pros:
    *   Avoids loading an external library, reducing memory and execution overhead.
    *   Can be more suitable for small applications or those requiring strict control over performance.

Cons:

*   Requires manual implementation, which can lead to potential errors if not done correctly.
    *   May not be as efficient as using a well-tested library like Lodash.

**Other Considerations**

*   **Constructor Functions**: Both tests use constructor functions (`Foo`) and `null` values. This helps ensure that the code handles these cases correctly, which is essential for robustness.
*   **Type Coercion**: The custom `isObject` function uses type coercion to check if an object has no prototype chain. This approach may be faster but also introduces potential pitfalls due to the complexity of JavaScript's type system.

**Benchmark Results**

The latest benchmark results show that the custom `isObject` function performs slightly better than Lodash's `isPlainObject` in this specific test case, likely due to reduced overhead from loading an external library. However, the performance difference may not be significant for most use cases.

When deciding between these approaches, consider the trade-offs between simplicity, maintainability, and performance. If you need robustness, readability, and a reliable library, Lodash's `isPlainObject` might be the better choice. If you prioritize low overhead, custom implementation, and fine-grained control, the `isObject` function could be suitable for your specific needs.

Related benchmarks:

Lodash isPlainObject vs JS Constructor Check (with more cases) (version: 0)

Comparing performance of: Lodash isPlainObject vs JS Type Check

Created: 5 years ago by: Registered User

Jump to the latest result

Lodash isPlainObject

JS Type Check

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):