Benchmark: AAkkbjhvghcjtf - MeasureThat.net

Script Preparation code:

function onlyUnique(value, index, array) {
  return array.indexOf(value) === index;
}

Tests:

1
const a = ['1', '2', '1', '4'].filter(onlyUnique)
2
const a = new Set(['1', '2', '1', '4'])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON data to explain what's being tested, compared, and other considerations.

**Benchmark Definition:**

The benchmark definition is a simple JavaScript function named `onlyUnique` that takes three arguments (`value`, `index`, and `array`) and returns `true` if the value is unique in the array. The purpose of this function is to filter out duplicate values from an array.

**Options Compared:**

Two approaches are being compared:

1. **Filter Method**: Using the `filter()` method with the `onlyUnique` function.
2. **Set Data Structure**: Creating a new Set data structure and adding elements to it, which will automatically eliminate duplicates.

**Pros and Cons:**

* **Filter Method:**
	+ Pros:
		- Easy to understand and implement.
		- Can be used for small to medium-sized arrays.
	+ Cons:
		- Has a time complexity of O(n), where n is the array length, making it slower than Set operations for large arrays.
		- Creates a new array with duplicate values removed, which can lead to memory usage issues.
* **Set Data Structure:**
	+ Pros:
		- Has an average time complexity of O(1) for adding elements and checking uniqueness.
		- Does not require manual implementation or understanding of the `filter()` method.
	+ Cons:
		- Not all browsers support Sets, so it might not work in older versions of Chrome or other browsers.

**Library:**

In the individual test cases, the library being used is **Set**, which provides a data structure that automatically eliminates duplicates. The purpose of using a Set here is to compare its performance with the `filter()` method.

**Special JS Feature/Syntax:**

There's no special JavaScript feature or syntax mentioned in this benchmark. However, it's worth noting that Sets were introduced in ECMAScript 2015 (ES6) and are widely supported by modern browsers.

**Other Alternatives:**

If you want to compare other approaches, here are some alternatives:

* **Using `reduce()`**: You can also use the `reduce()` method with a callback function to achieve the same result as the `filter()` method.
* **Using `map()` and `every()`**: Another approach is to use `map()` to create a new array without duplicates and then check if every element in the array meets a certain condition using the `every()` method.

In summary, this benchmark compares two approaches for removing duplicates from an array: using the `filter()` method with a custom function versus creating a Set data structure. The results of this comparison can help users understand which approach is faster and more memory-efficient for their specific use case.

Related benchmarks:

AAkkbjhvghcjtf (version: 0)

Comparing performance of: 1 vs 2

Created: 2 years ago by: Guest

Jump to the latest result

1

2

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):