Benchmark: Lodash isPlainObject vs. typeof === "object" && !Array.isArray

HTML Preparation code:

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

Script Preparation code:

var sampleObject = null;

Tests:

Lodash isPlainObject
_.isPlainObject(sampleObject);
typeof
typeof sampleObject === 'object' && !Array.isArray(sampleObject)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash isPlainObject
typeof

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_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Browser/OS: Chrome 127 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash isPlainObject	10216044.0 Ops/sec
typeof	7970670.5 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 provided benchmark and explain what's being tested.

**Benchmark Definition JSON**

The benchmark is defined as follows:

* **Name**: `Lodash isPlainObject vs. typeof === "object" && !Array.isArray`
* **Description**: None (empty string)
* **Script Preparation Code**: Sets a sample object variable to `null`.
* **Html Preparation Code**: Includes the Lodash library (version 4.17.20) via a CDN.

This benchmark compares two approaches:

1. Using Lodash's `isPlainObject` function.
2. Checking if an object is created using the `typeof` operator and then verifying it's not an array using the `!Array.isArray` check.

**Options Compared**

The two options being compared are:

1. **Lodash's `isPlainObject`**: A utility function provided by Lodash that checks if a value is a plain object (not an instance of any other class).
2. **typeof + !Array.isArray**: A JavaScript operator-based approach that checks the type of a variable and verifies it's not an array.

**Pros and Cons**

1. **Lodash's `isPlainObject`**:
	* Pros: Concise, efficient, and easy to read.
	* Cons: Requires including an additional library (Lodash) in your test environment.
2. **typeof + !Array.isArray**:
	* Pros: No external libraries required, lightweight, and straightforward.
	* Cons: Less readable, as it involves multiple operations.

**Library - Lodash**

The `isPlainObject` function is part of the Lodash library, which provides a set of functional programming helpers. In this context, it's used to check if an object is plain (not an instance of any other class).

**Special JavaScript Feature/Syntax**

There is no special JavaScript feature or syntax being tested in this benchmark.

**Alternative Approaches**

Other alternatives for checking if an object is plain could include:

1. Using the `instanceof` operator with a custom implementation.
2. Verifying the object's prototype chain using `Object.getPrototypeOf()` and comparing it to `null`.
3. Implementing a custom function that checks the object's properties and structure.

However, these alternatives might add unnecessary complexity or require additional libraries, making Lodash's `isPlainObject` or the `typeof + !Array.isArray` approach more suitable for this benchmark.

**Benchmark Preparation Code**

The provided script preparation code sets a sample object variable to `null`, which is then used in both test cases. This ensures that both approaches are tested with an empty object, allowing for a fair comparison of their performance.

**Individual Test Cases**

The two test cases are:

1. **Lodash isPlainObject**: Verifies if the sample object passed as an argument to `isPlainObject` is indeed plain.
2. **typeof**: Verifies if the sample object is created using `typeof` and then checks if it's not an array using `!Array.isArray`.

These test cases demonstrate how each approach performs in terms of execution speed, which is essential for evaluating performance in a benchmarking scenario like MeasureThat.net.

Related benchmarks:

Lodash isPlainObject vs. typeof === "object" && !Array.isArray (version: 0)

Comparing performance of: Lodash isPlainObject vs typeof

Created: one year ago by: Guest

Jump to the latest result

Lodash isPlainObject

typeof

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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