Benchmark: fromArray or desctucturing to convert Set to array

Script Preparation code:

var set = new Set([1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]);

Tests:

Array from
return Array.from(set);
Desructuring
return [...set]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array from
Desructuring

Fastest: N/A

Slowest: N/A

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/605.1.15 (KHTML, like Gecko) Version/18.4 Safari/605.1.15

Browser/OS: Safari 18 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array from	7711459.5 Ops/sec
Desructuring	7022300.0 Ops/sec

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 considered.

**What is being tested?**

The benchmark compares two approaches to convert a `Set` object to an array:

1. Using the `Array.from()` method.
2. Using destructuring assignment (the spread operator, `...`).

**Options comparison:**

* **Array.from()**: This method creates a new, shallow-copied array from an iterable or an array-like object. It's a built-in method in JavaScript that takes an optional second argument, which can be used to specify the mapping function.
* **Destructuring (Spread Operator)**: This approach uses the spread operator (`...`) to create a new array from the elements of the `Set` object.

**Pros and Cons:**

* **Array.from()**: Pros:
	+ Can handle sets with a large number of elements efficiently, as it doesn't require iterating over each element.
	+ Allows for specifying a mapping function, which can be useful in certain scenarios.
Cons:
	+ Creates an additional array, which might not be desirable if memory is limited.
* **Destructuring (Spread Operator)**: Pros:
	+ Does not create a new array, as it simply returns the elements of the `Set` object directly.
	+ Can be more efficient for small sets or when using modern browsers with optimized spread operator support.
Cons:
	+ Might require iterating over each element in the set, which could lead to performance issues for large sets.

**Library usage:**

There is no explicit library mentioned in the benchmark definition. However, it's worth noting that both approaches rely on the `Set` object, which is a built-in JavaScript data structure.

**Special JS feature or syntax:**

The benchmark uses the spread operator (`...`) and the `Array.from()` method, which are both standard JavaScript features. No special features or syntax are required to run these tests.

**Other alternatives:**

If you're interested in exploring alternative approaches, here are a few options:

* Using a library like Lodash, which provides a utility function called `fromJS` that can be used to convert sets to arrays.
* Implementing your own custom method to convert the set to an array, such as using `slice()` or `reduce()`.
* Using a different data structure, like a typed array (e.g., Int32Array), which might offer better performance for certain use cases.

Keep in mind that these alternatives may not be relevant to this specific benchmark, and the results may vary depending on the implementation and browser version used.

Related benchmarks:

fromArray or desctucturing to convert Set to array (version: 0)

Comparing performance of: Array from vs Desructuring

Created: 4 years ago by: Registered User

Jump to the latest result

Array from

Desructuring

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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