Benchmark: set operations - MeasureThat.net

Script Preparation code:

window.a = new Set([1,2,3,20,166,3652,175,180,9,10,166,3651,174,229,180]);
window.b = new Set([4,3,2,166,3652,174,179,8,10,167,3651,175,231]);

Tests:

1
const union = new Set([...a, ...b]);
2
let union = new Set(a); for (let elem of b) { union.add(elem); }

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):

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The provided JSON represents a benchmark definition for a test case involving set operations in JavaScript. Here's what's being tested:

**Script Preparation Code:**
```javascript
window.a = new Set([1,2,3,20,166,3652,175,180,9,10,166,3651,174,229,180]);
window.b = new Set([4,3,2,166,3652,174,179,8,10,167,3651,175,231]);
```
Two sets, `a` and `b`, are created using the `Set` constructor. The content of these sets is defined in the script preparation code.

**Benchmark Definition:**
There are two benchmark definitions:

1. **Union Construction**: `const union = new Set([...a, ...b]);`
This line creates a new set called `union` by concatenating the elements of sets `a` and `b` using the spread operator (`...`).
2. **Union Construction with Loops**: `let union = new Set(a); for (let elem of b) { union.add(elem); }`

The first definition is similar to the traditional way of creating a set from two arrays, while the second one uses a loop to add elements from `b` to the initial set created from `a`.

**Comparison of Options:**

1. **Union Construction**: This method creates a new set with all unique elements from both sets. It's often the most efficient approach.
	* Pros:
		+ Fast and efficient, especially for large datasets.
		+ Creates a new set with unique elements, which can be useful in certain scenarios.
	* Cons:
		+ May create unnecessary copies of data if the sets are very large.
2. **Union Construction with Loops**: This approach uses an iterative way to add elements from `b` to the initial set created from `a`.
	* Pros:
		+ Can be more memory-efficient for large datasets, as it avoids creating a new set.
		+ Easy to implement and understand.
	* Cons:
		+ May be slower than the traditional approach due to the loop overhead.

**Library:**
None, this benchmark does not use any external libraries.

**Special JS Features/Syntax:**
This benchmark uses JavaScript's spread operator (`...`), which is a feature introduced in ECMAScript 2015. It allows for creating new arrays or sets by copying elements from an existing array or set.

**Other Alternatives:**

* If you want to create a union of two arrays without using the `Set` constructor, you can use the `Array.prototype.concat()` method: `const union = new Array(a).concat(b);`
* Another approach is to use the `Set.prototype.forEach()` method to iterate over one set and add elements from another: `for (let elem of a) { b.add(elem); }`

Keep in mind that these alternatives may have different performance characteristics compared to using the `Set` constructor.

Related benchmarks:

set operations (version: 0)

Comparing performance of: 1 vs 2

Created: 6 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):