Benchmark: Reflect.has vs Direct Check2

Script Preparation code:

appConfig = {
    name: 'John',
    age: 30,
    address: {
        street: '123 Main St',
        city: 'Anytown',
        state: 'CA',
        zip: '12345'
    },
    hobbies: ['reading', 'painting', 'hiking', 'cooking', 'traveling', 'photography', 'gaming', 'writing', 'yoga', 'dancing'],
    favoriteFoods: [{
            name: 'Pizza',
            type: 'Italian',
            ingredients: ['cheese', 'pepperoni', 'mushrooms', 'olives', 'tomatoes']
        },
        {
            name: 'Sushi',
            type: 'Japanese',
            ingredients: ['rice', 'nori', 'fish', 'vegetables', 'wasabi', 'soy sauce']
        },
        {
            name: 'Tacos',
            type: 'Mexican',
            ingredients: ['tortillas', 'beef', 'chicken', 'beans', 'lettuce', 'tomatoes', 'salsa', 'guacamole']
        }
    ],
    friends: [{
            name: 'Sarah',
            age: 28,
            address: {
                street: '456 Elm St',
                city: 'Anytown',
                state: 'CA',
                zip: '12345'
            },
            hobbies: ['reading', 'traveling', 'hiking'],
            favoriteFoods: [{
                    name: 'Pad Thai',
                    type: 'Thai',
                    ingredients: ['noodles', 'shrimp', 'tofu', 'peanuts', 'vegetables', 'spices']
                },
                {
                    name: 'Biryani',
                    type: 'Indian',
                    ingredients: ['rice', 'chicken', 'spices', 'yogurt', 'onions']
                }
            ]
        },
        {
            name: 'Tom',
            age: 32,
            address: {
                street: '789 Oak St',
                city: 'Anytown',
                state: 'CA',
                zip: '12345'
            },
            hobbies: ['gaming', 'photography', 'traveling'],
            favoriteFoods: [{
                    name: 'Burger',
                    type: 'American',
                    ingredients: ['beef', 'bun', 'cheese', 'lettuce', 'tomato', 'onion', 'pickles', 'ketchup', 'mustard']
                },
                {
                    name: 'Sushi',
                    type: 'Japanese',
                    ingredients: ['rice', 'nori', 'fish', 'vegetables', 'wasabi', 'soy sauce']
                }
            ]
        }
    ]
};

Tests:

Reflect
const key = 'name'; if (Reflect.has(appConfig, key)) { console.log(appConfig[key]); }
Direct
const key = 'name'; if (appConfig[key]) { console.log(appConfig[key]); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Reflect
Direct

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**Benchmark Definition**

The benchmark tests two approaches to check if a property exists in an object: using the `Reflect.has()` method and a direct property access (`appConfig[key]`).

**Options Compared**

There are two options being compared:

1. **Direct Property Access**: This approach uses a simple property access (`appConfig[key]`) to retrieve the value of the `name` property from the `appConfig` object.
2. **Reflect.has() Method**: This approach uses the `Reflect.has()` method, which is a built-in JavaScript function that checks if an object has a specific own property.

**Pros and Cons**

**Direct Property Access:**

Pros:

* Simple and easy to implement
* Fast and efficient (no function calls or overhead)

Cons:

* May not work correctly for all types of objects or properties (e.g., inherited properties, symbol properties)
* Does not provide any information about the property's existence

**Reflect.has() Method:**

Pros:

* Works with all types of objects and properties
* Provides information about the property's existence, such as its type and presence in the object's prototype chain

Cons:

* May be slower than direct property access due to function call overhead
* Requires importing the `Reflect` module (in modern browsers)

**Other Considerations**

* The benchmark uses a sample object with multiple nested properties (`appConfig`) to test the performance of both approaches.
* The benchmark measures the number of executions per second for each approach, which indicates performance.

**Libraries and Special JS Features**

In this benchmark, there is no explicit use of any libraries or special JavaScript features. However, the `Reflect` module is used in the `Reflect.has()` method, which is a built-in JavaScript feature.

**Alternatives**

If you want to measure the performance of other approaches to check if a property exists in an object, some alternatives could be:

* Using `in` operator: `if (key in appConfig) { ... }`
* Using `hasOwnProperty()` method: `if (appConfig.hasOwnProperty(key)) { ... }`

Keep in mind that each approach has its own trade-offs and may not be suitable for all use cases.

Related benchmarks:

Reflect.has vs Direct Check2 (version: 0)

Comparing performance of: Reflect vs Direct

Created: 3 years ago by: Guest

Jump to the latest result

Reflect

Direct

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):