Benchmark: unique coordinates

Script Preparation code:

var coordinates = [
        35.7790733, -5.8453983,
        35.779335, -5.8465283,
        35.7790733, -5.8453983,
        35.779705, -5.84782
]

Tests:

Array from - Set
var unique = Array.from(new Set(coordinates.reduce((r, a, i) => (i % 2 ? r[r.length - 1].push(a) : r.push([a]), r), []).map(a => a.join('|'))), s => s.split('|').map(Number));
For loops
var temp = []; var unique = []; var uniqueCoords = []; for (var i = 0; i < coordinates.length; i += 2) { temp.push(coordinates[i] + '---' + coordinates[i + 1]); // create some strings } for (var i = 0; i < temp.length; i++) { if (unique.indexOf(temp[i]) === -1) // remove duplicates unique.push(temp[i]); } for (var i = 0; i < unique.length; i++) { // split the strings back into array uniqueCoords = uniqueCoords.concat(unique[i].split('---')); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array from - Set
For loops

Fastest: N/A

Slowest: N/A

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

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Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark definition provides the setup for the test, which is to create an array of unique coordinates from an input array `coordinates`. There are two different approaches:

1. **Using `Array.from` and `Set`**: This approach uses the `Array.from()` method to create a new array from the set of unique elements in the `coordinates` array. The `Set` object is used to automatically remove duplicates.
2. **Using for loops**: This approach uses two nested for loops to iterate through the `coordinates` array, creating an intermediate string array and then removing duplicates using the `indexOf()` method.

**Options Compared**

The benchmark compares the performance of these two approaches:

1. **Approach 1: Using `Array.from` and `Set`**
	* Pros:
		+ Efficient use of memory, as it only stores unique elements.
		+ Fast, as it leverages the optimized implementation of `Set`.
	* Cons:
		+ May not perform well for very large input arrays due to memory constraints.
2. **Approach 2: Using for loops**
	* Pros:
		+ Can handle larger input arrays without significant memory overhead.
	* Cons:
		+ Less efficient, as it creates an intermediate string array and uses a slower `indexOf()` method.

**Library**

The benchmark uses the `Set` object, which is a built-in JavaScript library. The purpose of this library is to store unique values in an object-like data structure.

**JavaScript Feature/ Syntax**

There are no special JS features or syntax used in this benchmark. It's focused on comparing the performance of two algorithms.

**Other Alternatives**

If you wanted to use a different approach, here are some alternatives:

1. **Using `map()` and `reduce()`**: Instead of using `Set`, you could use the `map()` method to create an array of unique elements, followed by the `reduce()` method to combine them into a single array.
2. **Using a custom data structure**: You could implement your own custom data structure to store unique values, rather than relying on the built-in `Set` object.

Keep in mind that these alternatives might not be as efficient or memory-friendly as using `Set`, but they can provide interesting insights into different algorithmic approaches.

In summary, this benchmark tests the performance of two different algorithms for creating an array of unique coordinates from a given input array. Approach 1 uses `Array.from` and `Set`, while Approach 2 uses for loops.

Related benchmarks:

unique coordinates (version: 0)

Comparing performance of: Array from - Set vs For loops

Created: 8 years ago by: Guest

Jump to the latest result

Array from - Set

For loops

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):