Benchmark: Object.getOwnPropertyDescriptor().value vs Reflect.getOwnPropertyDescriptor()

Tests:

Object.getOwnPropertyDescriptor()
let object1 = { property1: 42 }; Object.getOwnPropertyDescriptor(object1, 'property1').value;
Reflect.getOwnPropertyDescriptor()
let object1 = { property1: 42 }; Reflect.getOwnPropertyDescriptor(object1, 'property1').value;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.getOwnPropertyDescriptor()
Reflect.getOwnPropertyDescriptor()

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

The provided JSON represents a benchmark test on MeasureThat.net, where users can create and run JavaScript microbenchmarks. The benchmark is designed to compare two approaches: `Object.getOwnPropertyDescriptor()` and `Reflect.getOwnPropertyDescriptor()`. Let's break it down:

**What is tested?**

Both tests measure the execution time of accessing a property value in an object using two different methods.

**Options compared:**

1. **`Object.getOwnPropertyDescriptor()`**: This method returns a descriptor object containing information about a property, including its value.
2. **`Reflect.getOwnPropertyDescriptor()`**: This method returns a descriptor object with the same information as `Object.getOwnPropertyDescriptor()`, but it's part of the Reflect API, which provides additional functionality for working with objects.

**Pros and Cons:**

1. **`Object.getOwnPropertyDescriptor()`**:
	* Pros: Simple, widely supported, and has been around since JavaScript 1.0.
	* Cons: Can be slower due to its older implementation.
2. **`Reflect.getOwnPropertyDescriptor()`**:
	* Pros: Part of the Reflect API, which provides a more modern and efficient way to work with objects.
	* Cons: Requires support for the Reflect API, which might not be available in older browsers or environments.

**Library and Purpose:**

Neither test uses an external library. The `Object.getOwnPropertyDescriptor()` method is part of the built-in JavaScript object prototype, while `Reflect.getOwnPropertyDescriptor()` is also a built-in method.

**Special JS feature or syntax:**

There are no special features or syntaxes used in these tests.

**Other alternatives:**

If you wanted to compare these approaches using a different method, you could use:

1. **`Object.keys()` and `obj[property]```**: This approach would involve accessing the property value by its name using `Object.keys()`, which returns an array of property names. Then, you can access the property value using bracket notation (`obj[property]`).
2. **`for...in` loop**: You could use a `for...in` loop to iterate over the object's properties and access their values.

Here's an example of how these alternatives might be implemented:

```javascript
// Using Object.keys()
let object1 = { property1: 42 };
Object.keys(object1).forEach(key => {
    console.log(object1[key]);
});

// Using a for...in loop
let object2 = { property1: 42 };
for (let key in object2) {
    if (object2.hasOwnProperty(key)) {
        console.log(object2[key]);
    }
}
```

Keep in mind that these alternatives might not be as efficient or modern as using `Object.getOwnPropertyDescriptor()` and `Reflect.getOwnPropertyDescriptor()`.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser/OS: Chrome 118 on Windows

View result in a separate tab

Test name	Executions per second
Object.getOwnPropertyDescriptor()	3913023.0 Ops/sec
Reflect.getOwnPropertyDescriptor()	3851976.0 Ops/sec

Related benchmarks:

Object.getOwnPropertyDescriptor().value vs Reflect.getOwnPropertyDescriptor() (version: 0)

Comparing performance of: Object.getOwnPropertyDescriptor() vs Reflect.getOwnPropertyDescriptor()

Created: 2 years ago by: Guest

Jump to the latest result

Object.getOwnPropertyDescriptor()

Reflect.getOwnPropertyDescriptor()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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