Benchmark: splice vs set javascript

Script Preparation code:

var array = new Array(100).map((a, i) => i)
var set = new Set(array)

Tests:

slice
array = array.splice(1, 0)
set
set.delete(1)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
set

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser/OS: Chrome 118 on Windows

View result in a separate tab

Test name	Executions per second
slice	4183599.5 Ops/sec
set	10481040.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**What is being tested?**

The provided JSON represents two test cases: `splice vs set javascript`. The goal of this benchmark is to compare the performance of JavaScript arrays using `splice` versus sets (an implementation of a set data structure).

**Options compared:**

1. **Splice**: This method modifies the original array by removing elements from a specified range and appending new elements.
2. **Set**: A set data structure, which is an unordered collection of unique values.

**Pros and Cons of each approach:**

**Splice:**

Pros:

* Modifies the original array in place, avoiding unnecessary memory allocations.
* Can be used to add or remove multiple elements at once.

Cons:

* Modifies the original array, which can lead to unexpected behavior if the array is not intended to be modified.
* Can be slower than creating a new set for large datasets due to the overhead of modifying an array.

**Set:**

Pros:

* Creates a new, isolated collection of unique values, avoiding modifications to the original array.
* Can be faster for large datasets since it avoids the overhead of modifying an array.

Cons:

* Requires more memory allocations and garbage collection, potentially leading to slower performance.
* Does not provide direct access to elements like arrays do.

**Library:**

In this benchmark, `Set` is a built-in JavaScript data structure. The `Set` constructor creates a new set from the provided array using the `Array.prototype.map()` method to create an array of unique values.

**Special JS feature or syntax:**

This benchmark does not explicitly use any special JavaScript features or syntax beyond standard JavaScript. However, it's worth noting that modern browsers often optimize and cache frequently accessed methods like `splice()` and `Set().delete()`, which might affect the results.

**Other alternatives:**

1. **Array.prototype.push()**: Instead of using `splice()`, one could use `push()` to add elements to the end of an array.
2. **Array.prototype.shift()**: Using `shift()` to remove elements from the beginning of an array instead of `splice(0, 1)`.
3. **Other data structures**: Alternative data structures like linked lists or trees could be used for comparison.

Keep in mind that each alternative may introduce significant changes to the benchmark's behavior and results.

Related benchmarks:

splice vs set javascript (version: 0)

Comparing performance of: slice vs set

Created: one year ago by: Guest

Jump to the latest result

slice

set

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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