Benchmark: Delete vs destructure for objects without mutating 2

Script Preparation code:

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

Tests:

delete
delete obj.a
Rest object
const { a, ...rest } = obj;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
delete
Rest object

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 JSON and explain what is being tested on MeasureThat.net.

**Benchmark Definition**

The benchmark is titled "Delete vs destructure for objects without mutating 2" with the following description:

"Measure the performance of delete versus removing a prop from an object without mutating"

In essence, this benchmark compares two approaches to remove a property from an object:

1. Using the `delete` operator: `delete obj.a`
2. Using destructuring assignment: `const { a, ...rest } = obj;`

**Options Compared**

The two options being compared are:

* **Delete**: The `delete` operator is used to delete a property from an object without mutating it.
* **Destructure**: Destructuring assignment is used to remove a property from an object by creating a new object with the desired properties.

**Pros and Cons of Each Approach**

1. **Delete**:
	* Pros: Simple, straightforward approach.
	* Cons: May cause unexpected side effects if not used carefully (e.g., deleting a property that is referenced elsewhere in the code).
2. **Destructure**:
	* Pros: More explicit and safe way to remove properties, as it creates a new object without modifying the original one.
	* Cons: Can be slightly slower due to the creation of a new object.

**Library and Special JS Features**

There is no library being used in this benchmark. However, destructuring assignment was introduced in ECMAScript 2015 (ES6) and is a feature that allows for more concise and expressive way of handling objects.

**Other Considerations**

* The benchmark is designed to measure the performance difference between these two approaches on a specific object (`obj`) without mutating it.
* The benchmark only measures the execution time, not other aspects such as memory usage or CPU cycles.

**Alternative Approaches**

Other alternatives for removing properties from an object include:

* Using the `Object.keys()` and `splice()` methods: `obj.keys().splice(0, 1);`
* Using a library like Lodash's `remove` function: `_remove(obj, 'a');`
* Using a recursive approach to delete properties (not recommended due to performance issues).

Keep in mind that these alternative approaches may have different trade-offs in terms of performance, safety, and readability.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
delete	25908022.0 Ops/sec
Rest object	2867707.8 Ops/sec

Related benchmarks:

Delete vs destructure for objects without mutating 2 (version: 0)

Measure the performance of delete versus removing a prop from an object without mutating

Comparing performance of: delete vs Rest object

Created: one year ago by: Guest

Jump to the latest result

delete

Rest object

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):