Benchmark: Spread Set or _.unique

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Tests:

Spread set
const array = [1, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 0]; return [...new Set(array)];
Uniq
const array = [1, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 0]; return _.uniq(array);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread set
Uniq

Fastest: N/A

Slowest: N/A

Latest run results:

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

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**Benchmark Definition**

The benchmark definition represents the JavaScript code that is being tested for performance. In this case, there are two benchmarks:

1. `Spread set`: This benchmark measures the time it takes to remove duplicate elements from an array using the spread operator (`[...new Set(array)]`).
2. `_uniq` (Lodash): This benchmark measures the time it takes to remove duplicate elements from an array using the Lodash library's `uniq` function.

**Options Compared**

The two benchmarks are comparing the performance of:

* Using the spread operator to create a new Set and then spreading its elements back into an array (`[...new Set(array)]`)
* Using the Lodash library's `uniq` function to remove duplicates from an array

**Pros and Cons**

Here are some pros and cons of each approach:

* **Spread Operator**:
	+ Pros: Simple, intuitive, and easy to read. No additional dependencies required.
	+ Cons: May not be as efficient as using a Set for duplicate removal, especially for large datasets.
* **Lodash `_uniq` Function**:
	+ Pros: More efficient than the spread operator for large datasets. Handles edge cases like empty arrays and arrays with only one element.
	+ Cons: Requires an additional dependency (the Lodash library). May be overkill for simple use cases.

**Library: Lodash**

The `_.uniq` function is part of the Lodash library, which provides a collection of useful functional programming helpers. In this benchmark, Lodash is used to provide a more efficient way to remove duplicates from an array.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax used in these benchmarks that require explanation. Both approaches use standard JavaScript syntax and do not rely on any experimental features or syntax sugar.

**Other Alternatives**

If you want to measure the performance of other methods for removing duplicates from an array, here are some alternatives:

* Using a `Set` object directly: `new Set(array).size`
* Using the `filter()` method: `array.filter((value, index) => array.indexOf(value) === index)`
* Using a custom implementation with nested loops

These alternatives may have different performance characteristics compared to the spread operator and Lodash `_uniq` function.

Related benchmarks:

Spread Set or _.unique (version: 0)

Comparing performance of: Spread set vs Uniq

Created: 3 years ago by: Guest

Jump to the latest result

Spread set

Uniq

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):