Benchmark: Assignment of value vs Destructuring an object ee

Tests:

Destructure
const obj = {a: 'a', b: 'b'}; const dupl = {a: 'a', c: 'c'}; const { b } = obj const newObj = {...dupl, b} console.log(newObj);
Assign
const obj = {a: 'a', b: 'b'}; const dupl = {a: 'a', c: 'c'}; const newObj = dupl newObj.b = obj.b console.log(newObj);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Destructure
Assign

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Destructure	273110.2 Ops/sec
Assign	269854.5 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what is being tested, compared, and some pros/cons of each approach.

**Benchmark Definition**

The `Assignment of value vs Destructuring an object` benchmark tests two different approaches to assigning values in JavaScript:

1. **Assignment**: Creating a new object (`newObj`) by copying properties from another object (`dupl`) and then assigning the value of `obj.b` to it.
2. **Destructuring**: Using destructuring assignment to extract the value of `b` from the original object (`obj`) and then creating a new object (`newObj`) with the extracted value.

**Options Compared**

The two options being compared are:

* **Assignment**: Creating a new object by copying properties from another object and assigning values manually.
* **Destructuring**: Using destructuring assignment to extract values from an object and create a new object with those values.

**Pros/Cons of Each Approach**

1. **Assignment**:
	* Pros: Can be more intuitive for some developers, as it's a straightforward way to assign values.
	* Cons: Can lead to slower performance, especially when dealing with large objects or complex assignment patterns.
2. **Destructuring**:
	* Pros: Generally faster and more efficient than assignment, as it avoids the overhead of creating a new object.
	* Cons: May be less intuitive for some developers who are not familiar with destructuring syntax.

**Library/Feature Used**

There is no specific library mentioned in the provided JSON data. However, the `...` operator used to create a shallow copy of an object is a feature introduced in ECMAScript 2015 (ES6). It allows you to create a new object by spreading properties from another object, making it easier to work with objects and arrays.

**Special JS Feature/Syntax**

The `...` operator used for destructuring assignment is a special JavaScript syntax that was introduced in ES6. It's not part of the traditional JavaScript syntax and may not be supported by older browsers or environments.

**Alternatives**

If you're interested in exploring alternative approaches to this benchmark, here are some options:

* **Spread operator**: While not exactly the same as destructuring, using the spread operator (`{ ...dupl, b: obj.b }`) can provide a similar result without the need for explicit object creation.
* **JSON clone**: Creating a JSON clone of an object using `JSON.parse(JSON.stringify(obj))` could be another approach to assign values. However, this method may have performance implications due to the overhead of serializing and deserializing objects.

Keep in mind that these alternatives might not provide the same level of efficiency or readability as the original benchmark options.

Related benchmarks:

Assignment of value vs Destructuring an object ee (version: 0)

Comparing performance of: Destructure vs Assign

Created: 2 years ago by: Guest

Jump to the latest result

Destructure

Assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):