Benchmark: Set vs Good Filter for unique

Script Preparation code:

var array = Array.from({length: 40}, () => Math.floor(Math.random() * 140));

Tests:

Set spread
const f = [... new Set(array)]
Array from set
const s = new Set(array) const l = Array.from(s)
Filter
const b = array.filter((element,index, self) => self.indexOf(element)=== index)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Set spread
Array from set
Filter

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.

I'd be happy to explain the benchmark and its results.

**Benchmark Definition**

The provided JSON defines a benchmark named "Set vs Good Filter for unique". The benchmark consists of three test cases:

1. **Set spread**: This test case creates a new Set from an array using the spread operator (`[... new Set(array)]`).
2. **Array from set**: This test case creates a new Set from an array and then converts it back to an array using `Array.from(s)`.
3. **Filter**: This test case uses the `filter()` method to remove duplicates from an array.

**Options Compared**

The benchmark compares three options:

1. **Set spread**: Creates a new Set from an array using the spread operator.
2. **Array from set**: Converts a Set back to an array using `Array.from(s)`.
3. **Filter**: Uses the `filter()` method to remove duplicates from an array.

**Pros and Cons of Each Approach**

1. **Set spread**:
	* Pros: Creates a new Set, which can be more efficient than filtering or converting back to an array.
	* Cons: May not work as expected if the original array contains non-unique values (e.g., duplicates).
2. **Array from set**:
	* Pros: Can handle non-unique values in the original array.
	* Cons: Converts a Set back to an array, which may be slower than creating a new Set directly.
3. **Filter**:
	* Pros: Flexible and can handle complex filtering logic.
	* Cons: May be slower than the other two options, especially for large arrays.

**Library Usage**

None of the test cases use a specific library. However, `Array.from()` is a built-in method in JavaScript, while `Set` is also a built-in data structure.

**Special JS Feature/Syntax**

There are no special JS features or syntax used in these benchmark definitions. They only use standard JavaScript methods and operators.

**Other Alternatives**

If you wanted to optimize the filter method, you could consider using a more efficient filtering algorithm, such as the `Map` data structure combined with `filter()`. However, this would likely introduce additional complexity and may not be necessary for most use cases.

Another alternative is to use a library like Lodash, which provides a `uniq()` function that can remove duplicates from an array in a more efficient way than using `filter()`. However, this would require adding an external dependency to the benchmark.

Related benchmarks:

Set vs Good Filter for unique (version: 0)

Comparing performance of: Set spread vs Array from set vs Filter

Created: 2 years ago by: Guest

Jump to the latest result

Set spread

Array from set

Filter

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):