Benchmark: Set array expansion

Script Preparation code:

var mySet = new Set();

// Generate and add 10,000 unique items to the set
for (let i = 0; i < 10000; i++) {
  mySet.add(i);
}

Tests:

[...]
[...mySet]
Set.prototype.values()
mySet.values()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
[...]
Set.prototype.values()

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON for the "Set array expansion" benchmark.

**What is being tested?**

The benchmark tests two different approaches to working with large sets in JavaScript:

1. **Expanding the set into an array using the spread operator (`[...mySet]`)**: This approach converts the `Set` object into an array, allowing for indexing and iteration.
2. **Using the `values()` method of the `Set` prototype**: This approach returns a live view of the set's values as an iterable sequence.

**Options being compared**

The benchmark compares the performance of these two approaches:

* Expanding the set into an array using `[...mySet]`
* Using the `values()` method of the `Set` prototype

**Pros and Cons of each approach:**

1. **Expanding the set into an array using `[...mySet]`**:
	* Pros:
		+ Allows for indexing and iteration, which can be beneficial in certain scenarios.
		+ Can be used with existing array methods and libraries.
	* Cons:
		+ Creates a new array, which can lead to increased memory usage and slower performance.
		+ May not be the most efficient way to access individual elements or iterate over the set's values.
2. **Using the `values()` method of the `Set` prototype**:
	* Pros:
		+ Returns an iterable sequence, which allows for lazy iteration and reduced memory usage.
		+ Can be more efficient than expanding the set into an array.
	* Cons:
		+ May not support indexing or iteration in the same way as an array.
		+ Requires specific knowledge of the `Set` prototype's methods.

**Library used**

The benchmark uses the built-in `Set` object and its `values()` method, which is a part of the JavaScript standard library. No external libraries are required.

**Special JS feature or syntax**

This benchmark does not use any special JavaScript features or syntax beyond what's already covered by the standard library (e.g., `let`, `const`, `for`, etc.).

**Other alternatives**

If you're interested in exploring other approaches, here are a few examples:

* Using a different data structure, such as an array or object, to represent the set.
* Implementing your own iteration mechanism for sets using loops and conditional statements (as opposed to relying on built-in methods like `values()`).
* Using external libraries or frameworks that provide optimized implementations of set operations.

Keep in mind that these alternatives might not be supported by all JavaScript engines or environments.

Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
[...]	75898.0 Ops/sec
Set.prototype.values()	27722386.0 Ops/sec

Related benchmarks:

Set array expansion (version: 0)

Tests the implications of expanding large sets into an array for finding values within them

Comparing performance of: [...] vs Set.prototype.values()

Created: 6 months ago by: Guest

Jump to the latest result

[...]

Set.prototype.values()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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