Benchmark: unique coordinates

Script Preparation code:

var coordinates = [];

for (var i=0; i< 1e4; 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 map = {}; var unique = []; for (var i = 0; i < coordinates.length; i += 2) { var val = coordinates[i] + '|' + coordinates[i + 1]; if (!(val in map)) { map[val] = null; unique = unique.concat( [coordinates[i], coordinates[i+1] ]) } }

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 tested, compared, and other considerations.

**Benchmark Definition JSON**

The benchmark definition is a JavaScript code snippet that creates an array of unique coordinates. The coordinates are generated using `Math.random()` to create pseudo-random values between -180 and 180 degrees. The script preparation code generates an array of these coordinates with 100,000 elements.

**Test Cases**

There are two test cases:

1. **"Array from - Set"**: This test case uses the `Array.from()` method to create a new array from a set of unique values.
	* Library: None
	* Special JS feature/syntax: `Array.from()`
2. **"For loops"**: This test case uses two nested for loops to process the coordinates array and create a new array with unique values.
	* Library: None

**Comparison**

The benchmark compares the performance of using `Array.from()` versus traditional loop-based approaches (in this case, the "For loops" test case).

**Pros and Cons of Each Approach**

1. **`Array.from()`**:
	* Pros:
		+ More concise and readable code
		+ Faster execution time due to optimized implementation
	* Cons:
		+ May not be supported in older browsers or environments
2. **Traditional loop-based approach (For loops)**:
	* Pros:
		+ More control over the processing logic
		+ May be more readable for complex use cases
	* Cons:
		+ Longer code length and complexity
		+ May be slower due to unnecessary computations

**Other Considerations**

1. **Browser Support**: The benchmark uses Chrome 60 as a browser, which may not support older versions of the `Array.from()` method.
2. **Device Platform and Operating System**: The benchmark results are reported for Windows 7 on other devices, which may affect the performance due to differences in hardware and operating system.
3. **Execution Per Second**: This metric measures how many executions (i.e., iterations) per second can be achieved by the benchmark.

**Alternatives**

Other approaches to create a set of unique values include:

1. `Set` object: Creating an empty Set object and adding elements to it using the `add()` method.
2. `Array.reduce()`: Using `reduce()` method to reduce the array of coordinates to a single value that represents the unique coordinate.
3. Other libraries or frameworks, such as Lodash's `uniqBy()` function.

Keep in mind that each approach has its pros and cons, and the choice ultimately depends on the specific requirements of your use case.

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):