Benchmark: unique coordinates

Script Preparation code:

var coordinates = [];

for (var i=0; i< 500; i++) {
	coordinates.push(Math.round((Math.random()*360-180)*1e7)/1e7, Math.round((Math.random()*360-180)*1e7)/1e7)
}

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.includes(temp[i]))) { unique.push(temp[i]); uniqueCoords.push(temp[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

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 provided benchmark and explain what is being tested.

**Benchmark Overview**

The benchmark tests two different approaches to process an array of unique coordinates:

1. **"Array from - Set"**: This test uses `Array.from()` and `Set` objects to create a unique set of strings, where each string represents a pair of coordinates.
2. **"For loops"**: This test uses traditional for loops to iterate over the coordinates and add them to an array if they are not already present.

**Options Compared**

The two tests compare the performance of these different approaches:

* **"Array from - Set"**: Uses modern JavaScript features like `Array.from()` and `Set` objects, which can provide efficient set operations.
* **"For loops"**: Uses traditional for loops, which may be slower due to the overhead of loop control and array iteration.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

* **"Array from - Set"**:
	+ Pros: Efficient set operations, concise code.
	+ Cons: May require modern JavaScript features (e.g., `Set` objects) to be enabled.
* **"For loops"**:
	+ Pros: Wide compatibility with older browsers and environments, no additional libraries required.
	+ Cons: Potentially slower due to loop control overhead.

**Library**

None of the provided tests use any external libraries. The "Array from - Set" test relies on built-in JavaScript features like `Set` objects and `Array.from()`, while the "For loops" test uses only basic JavaScript constructs.

**Special JS Feature or Syntax**

The "Array from - Set" test uses modern JavaScript syntax, specifically:

* `Array.from()` to create a new array from an iterable.
* `Set` objects to efficiently store unique values.

These features are widely supported in modern browsers and can provide performance benefits when used correctly. However, older browsers may not support these features out of the box.

**Other Considerations**

When writing benchmarks like this, consider the following factors:

* **Code readability**: Make sure the code is easy to understand and maintain.
* **Browser support**: Test on multiple browsers and platforms to ensure compatibility.
* **Execution counts**: Use sufficient execution counts to get accurate results (e.g., at least 100-500 executions).
* **Warm-up phase**: Include a warm-up phase to allow the engine to execute the test code multiple times before measuring performance.

**Alternatives**

If you're interested in exploring alternative approaches, consider the following options:

* Use a library like Lodash or Ramda to provide set operations.
* Use an array-based approach with indices and bitwise operators for faster iteration.
* Experiment with different data structures, such as linked lists or trees, to optimize performance.

Keep in mind that these alternatives may introduce additional complexity and require more expertise to implement correctly.

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):