Benchmark: lodash has vs hasOwnPropertie

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var foo = {bar: 1};

Tests:

lodash has
_.has(foo, 'bar');
hasOwnPropertie
foo.hasOwnProperty('bar');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash has
hasOwnPropertie

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark is defined by two test cases:

1. `_.has(foo, 'bar');`: This test case uses the Lodash library to call the `has` function on an object `foo`, checking if a property named `'bar'` exists.
2. `foo.hasOwnProperty('bar');`: This test case manually checks if the `foo` object has a property named `'bar'` using the `hasOwnProperty` method.

**Options Compared**

The two test cases compare the performance of:

* Using Lodash's `has` function (`_.has(foo, 'bar')`) versus
* Manual checking with `hasOwnProperty` (`foo.hasOwnProperty('bar')`)

**Pros and Cons**

Using Lodash's `has` function has several advantages:

Pros:

* **Readability**: The code is more concise and readable.
* **Expressiveness**: The `has` function can be used to check for multiple properties, making it a more flexible option.

Cons:

* **Overhead**: Using an external library like Lodash may introduce additional overhead due to the need to load and initialize the library.
* **Dependency**: The benchmark relies on the availability of the Lodash library, which may not always be the case (e.g., in older browsers or environments).

On the other hand, manual checking with `hasOwnProperty` has some advantages:

Pros:

* **No dependencies**: This approach doesn't rely on any external libraries.
* **Performance-critical code**: In performance-critical code, avoiding extra dependencies can be beneficial.

Cons:

* **Code complexity**: The code is less concise and may require additional lines of code to achieve the same result.
* **Less expressive**: Using `hasOwnProperty` can lead to more verbose code when checking for multiple properties.

**Library - Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as:

* Array manipulation
* Object manipulation (e.g., `has`, `isEmpty`, `pick`)
* Function utility functions (e.g., `compact`, `curry`)

In this benchmark, Lodash's `has` function is used to check if an object has a specific property. The `_.has(foo, 'bar')` test case demonstrates the use of this function.

**Special JS feature - ES6 Optional Chaining**

The benchmark uses ES6 optional chaining (`?.`) in its HTML preparation code:
```html
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
```
Optional chaining allows you to access nested properties of an object without throwing an error if the property is null or undefined.

**Other Alternatives**

If you don't want to use Lodash's `has` function, you can implement your own version using the following approach:
```javascript
function has(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}
```
This implementation uses the `hasOwnProperty` method from the `Object` prototype to check if an object has a specific property.

Alternatively, you can use other JavaScript libraries or frameworks that provide similar functionality, such as:

* **Underscore.js**: Another popular utility library that provides a `has` function.
* **ES6 built-in functions**: The `in` operator and the `hasOwnProperty` method are available in modern browsers without any external dependencies.

Keep in mind that these alternatives may have different performance characteristics and usage patterns compared to Lodash's `has` function.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:96.0) Gecko/20100101 Firefox/96.0

Browser/OS: Firefox 96 on Windows

View result in a separate tab

Test name	Executions per second
lodash has	7442246.0 Ops/sec
hasOwnPropertie	778454528.0 Ops/sec

Related benchmarks:

lodash has vs hasOwnPropertie (version: 0)

Comparing performance of: lodash has vs hasOwnPropertie

Created: 5 years ago by: Guest

Jump to the latest result

lodash has

hasOwnPropertie

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):