Benchmark: Set vs Array for unique list (convert set to array)3

Script Preparation code:

var a = Array(1000).fill(null).map((a, b) => b);

Tests:

Unique Array
var b = []; a.forEach(x => { if (!b.includes(x)) b.push(x); }); b.map(x => x);
Set
var c = new Set(); a.forEach(x => c.add(x)); var d = Array.from(a); d.map(x => x);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Unique Array
Set

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its test cases.

**Benchmark Purpose:**
The goal of this benchmark is to compare two approaches for creating a unique list from an existing array:

1. Using `Array.prototype.forEach()` and adding elements to an empty array (`var b = [];`) if they are not already present.
2. Using a `Set` data structure, which automatically eliminates duplicates.

**Options Compared:**
The benchmark compares the performance of these two approaches:

Pros and Cons of Each Approach:

1. **Using Array.prototype.forEach() and adding to an empty array (`var b = [];`)**:
	* Pros:
		+ Easy to understand and implement.
		+ No additional library dependencies required.
	* Cons:
		+ May be slower due to the overhead of iterating over the entire array and checking for duplicates.
2. **Using a Set data structure (`var c = new Set();`)**:
	* Pros:
		+ More efficient for large datasets, as sets use a hash table data structure that allows for fast membership testing and insertion.
	* Cons:
		+ May be less intuitive for developers without experience with sets or hash tables.

**Library Used:**
In this benchmark, the `Set` data structure is used from the JavaScript built-in library (`var c = new Set();`). This is a common approach in modern web development, as sets provide an efficient way to eliminate duplicates and perform set operations.

**Special JS Feature/Syntax:**
There are no specific JavaScript features or syntax used in this benchmark that would require specialized knowledge. However, it's worth noting that the use of `Array.prototype.forEach()` and `Set` is a common pattern in modern web development.

**Other Alternatives:**
If you were to rewrite this benchmark using alternative approaches, here are some options:

1. Using `Array.prototype.filter()` instead of `forEach()`: This could be a faster approach if used correctly, but it might not be as intuitive for developers without experience with array methods.
2. Using `Map` data structure instead of `Set`: While maps and sets share similar use cases, maps provide additional features like key-value pairs, which might be overkill for this specific benchmark.

For this benchmark, the use of `Array.prototype.forEach()` and `Set` is a good choice because it:

* Is easy to understand and implement.
* Provides a clear demonstration of the trade-offs between different data structures and algorithms.

Related benchmarks:

Set vs Array for unique list (convert set to array)3 (version: 0)

Comparing performance of: Unique Array vs Set

Created: 5 years ago by: Registered User

Jump to the latest result

Unique Array

Set

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):