Benchmark: Checks if value is an object

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js'></script>

Script Preparation code:

var user = {
    'user': 'Toto',
    'age': 39
}

Tests:

lodash isPlainObject
_.isPlainObject(user);
typeof Lodash
typeof user === "object"

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash isPlainObject
typeof Lodash

Fastest: N/A

Slowest: N/A

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

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Let's dive into the world of JavaScript microbenchmarks.

**What is tested?**

MeasureThat.net tests the performance of two approaches for checking if a value is an object in JavaScript:

1. Using the `_.isPlainObject()` function from the Lodash library (a utility library for functional programming).
2. Using the `typeof` operator with a string comparison (`"object"`).

**Options compared**

The benchmark compares two options:

A) **Using Lodash's `_.isPlainObject()`**: This approach uses a specialized function from the Lodash library to check if an object is plain (i.e., not an instance of a prototype). This approach is likely to be faster and more accurate than a simple `typeof` check.

B) **Using `typeof` operator with string comparison**: This approach uses the `typeof` operator to check if the value is `"object"`, which can return `"string"` for objects with only string properties. This approach may not be as accurate as using `_.isPlainObject()` but is a more standard JavaScript way of checking.

**Pros and Cons**

A) **Using Lodash's `_.isPlainObject()`**:

Pros:

* Likely to be faster due to the optimized implementation in Lodash.
* More accurate, as it checks for specific object properties.

Cons:

* Requires including an additional library (Lodash), which may add overhead.
* May not work as expected if used with non-standard object constructors.

B) **Using `typeof` operator with string comparison**:

Pros:

* No additional libraries required, making it a lightweight option.
* Standard JavaScript syntax.

Cons:

* May be slower and less accurate than using `_.isPlainObject()`.
* Can return incorrect results for objects with only string properties (e.g., `"object"` instead of `"string"`).

**Library: Lodash**

Lodash is a popular utility library for functional programming in JavaScript. It provides a wide range of functions for tasks such as:

* Array manipulation
* Object manipulation
* String manipulation
* Higher-order functions

In this benchmark, Lodash's `_.isPlainObject()` function is used to check if an object is plain, which is different from checking if it's just "an object".

**Special JS feature: None**

There are no special JavaScript features or syntax mentioned in the benchmark definition.

**Other alternatives**

If you're looking for alternative ways to check if a value is an object in JavaScript, you can consider:

* Using `instanceof Object` (e.g., `var obj = { foo: 'bar' }; var isObject = obj instanceof Object;`)
* Using a simple `typeof` check with a regex pattern (`var isObject = typeof obj === 'object';`)
* Using a library like Moment.js or jQuery, which may provide similar functionality.

However, these alternatives may not be as accurate or efficient as using `_.isPlainObject()` from Lodash.

Related benchmarks:

Checks if value is an object (version: 1)

Difference between

Comparing performance of: lodash isPlainObject vs typeof Lodash

Created: 5 years ago by: Registered User

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lodash isPlainObject

typeof Lodash

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):