Benchmark: Delete or Destructure (Objects)

Script Preparation code:

var obj = {
  a:1,
  b:2,
  c:3
}

Tests:

Delete
delete obj.a delete obj.b console.log(JSON.stringify(obj, null, 4));
Destructure
var { a, b, ...rest } = obj; console.log(JSON.stringify(rest, null, 4));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Delete
Destructure

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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, compared, and discussed.

**Benchmark Overview**

The benchmark is designed to compare the performance of two approaches for deleting or destructuring objects in JavaScript:

1. Using the `delete` operator (Delete)
2. Using object destructuring syntax (Destructure)

**Options Compared**

In this benchmark, we have two test cases that use different approaches to delete or destructure an object.

* **Delete**: The `delete` operator is used to explicitly remove a property from the object.
* **Destructure**: Object destructuring syntax is used to extract properties from an object into separate variables.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Delete**
	+ Pros:
		- Explicit removal of property
		- Can be useful for debugging purposes
	+ Cons:
		- May not be as efficient as destructuring, since it involves a lookup in the object's prototype chain
		- Can lead to unexpected behavior if the property is used elsewhere in the code
* **Destructure**
	+ Pros:
		- More concise and expressive syntax
		- Efficient, since only the necessary properties are extracted from the object
	+ Cons:
		- May not be as explicit or readable for all developers

**Library/Functionality Used**

None of the provided benchmark code uses any external libraries. The `delete` operator is a built-in JavaScript function, and object destructuring syntax is a feature introduced in ECMAScript 2015 (ES6).

**Special JS Feature/Syntax**

There's no special JavaScript feature or syntax used in this benchmark.

**Other Alternatives**

If you're looking for alternative approaches to delete or destructure objects in JavaScript, here are a few options:

* Using `Object.keys()` and `Array.prototype.forEach()`: This approach involves iterating over the object's property names using `Object.keys()` and then removing each property from the object using `Array.prototype.forEach()`.
* Using a library like Lodash: Lodash provides several utility functions for manipulating objects, including `delete` and destructuring utilities.

**Benchmark Preparation Code**

The provided benchmark preparation code creates an object with three properties (`a`, `b`, and `c`) and assigns it to the `obj` variable. This object is then used as the input for both test cases.

**Individual Test Cases**

There are two individual test cases:

* **Delete**: This test case uses the `delete` operator to delete the `a` property from the `obj` object, followed by deleting the `b` property, and finally logging the resulting object using `JSON.stringify()`.
* **Destructure**: This test case uses object destructuring syntax to extract the `a`, `b`, and `c` properties from the `obj` object into separate variables (`a`, `b`, and `rest`), followed by logging the value of `rest` using `JSON.stringify()`.

**Latest Benchmark Result**

The provided benchmark result shows the execution times for both test cases on a Chrome 76 browser running on Linux. The results indicate that the destructuring approach is faster than the delete operator approach, with an average of approximately 17 seconds and 14 seconds per second, respectively.

Related benchmarks:

Delete or Destructure (Objects) (version: 0)

Comparing performance of: Delete vs Destructure

Created: 6 years ago by: Registered User

Jump to the latest result

Delete

Destructure

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):