Benchmark: omit vs delete 123444

Script Preparation code:

var omit = (keys, obj) => {
        if (!keys.length) return obj;
        keys.forEach((key) => {
          if (obj[key]) {
            delete obj[key];
          }
        });
        return obj;
    };

var data = {
  name: 'jhonny',
  age: 15,
  proffesion: 'farmer'
}

Tests:

delete
delete data.name; delete data.age;
omit
omit(['name', 'age'], data);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
delete
omit

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark definition is a JSON object that contains two scripts: `omit` and `delete`. The script `omit` takes an array of keys and an object as input, and returns the object with the specified keys deleted. The script `delete` deletes the properties `name` and `age` from the `data` object.

**Options Compared**

The benchmark is comparing two approaches:

1. **`omit` function**: This function iterates through the array of keys and deletes the corresponding properties from the object using the `delete` keyword.
2. **`delete` operator**: This operator directly deletes the specified properties from the object without iterating through an array.

**Pros and Cons**

**`omit` function:**

Pros:

* Allows for more flexibility, as it can delete multiple keys at once or perform additional operations on the deleted values.
* Can be used in situations where direct property deletion is not possible or desired (e.g., to avoid modifying the original object).

Cons:

* Has a higher overhead due to the iteration and potential unnecessary work when deleting properties that are not present in the array.
* May be slower than direct property deletion for large objects.

**`delete` operator:**

Pros:

* Directly deletes the specified properties without any additional iteration or processing, making it potentially faster.
* Can be more efficient when dealing with large numbers of properties to delete.

Cons:

* Less flexible, as it only allows deleting specific properties and does not provide an easy way to perform additional operations on deleted values.
* May not work in situations where direct property deletion is not possible (e.g., due to object mutations or other security measures).

**Library Used**

There is no explicit library mentioned in the benchmark definition. However, the `omit` function uses a syntax that resembles modern JavaScript functions (i.e., using an arrow function and destructuring assignment). This suggests that the test case might be using a relatively recent version of JavaScript.

**Special JS Feature or Syntax**

The benchmark defines two scripts using a syntax that is specific to modern JavaScript (ES6+): `var omit = (keys, obj) => { ... }` and `delete data.name;`. These features are not necessary for the basic functionality, but they do make the code more concise and readable. The `=>` operator is called an arrow function and allows for a shorter syntax for defining functions.

**Other Alternatives**

If you wanted to implement this benchmark in your own language or framework, here are some alternatives:

* **Java 8-style foreach loop**: Instead of using the `delete` operator, you could use a Java 8-style foreach loop to iterate through the keys and delete the corresponding properties.
* **C++ for loop**: If you were implementing this benchmark in C++, you might use a for loop to iterate through the keys and delete the corresponding properties.
* **Python dictionary comprehension**: In Python, you could use dictionary comprehension to create a new object with the specified keys removed.

Keep in mind that each of these alternatives would have its own pros and cons, depending on the specific requirements and constraints of your project.

Related benchmarks:

omit vs delete 123444 (version: 0)

Comparing performance of: delete vs omit

Created: 3 years ago by: Guest

Jump to the latest result

delete

omit

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):