Benchmark: Slice vs splice 2 ...

Script Preparation code:

var arrayOne = new Array(180).fill(1, 0, 180);

Tests:

slice
arrayOne.slice(6, -2);
splice
arrayOne.splice(6, arrayOne.length - 2 - 6)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
splice

Fastest: N/A

Slowest: N/A

Autogenerated LLM Sumamry (model llama3.2:3b, generated 2 days ago):

LLMs can make mistakes. Check important info.

I'll break down the test case and explain what's being tested.

**Benchmark Purpose:**
The benchmark compares the performance of two ways to remove elements from an array in JavaScript:

1. `arrayOne.slice(6, -2)`
2. `arrayOne.splice(6, arrayOne.length - 2 - 6)`

In other words, it tests how fast each method can remove a subset of elements from an array.

**Options Compared:**
The two options being compared are:

* **`slice()`**: Returns a shallow copy of a portion of an array.
* **`splice()`**: Removes elements from an array and returns the removed elements.

**Pros and Cons:**

* `slice()`: Pros:
	+ More straightforward to understand and implement.
	+ Returns a new array, so it doesn't modify the original array.
	Cons:
	+ Creates a new array object, which can be memory-intensive for large arrays.
	+ May have overhead due to creating an intermediate array.
* `splice()`: Pros:
	+ Modifies the original array in place, reducing memory allocation and garbage collection overhead.
	+ Can be faster for small arrays or when performance is critical.
Cons:
	+ Changes the original array, which may not be desirable if the array needs to remain intact.
	+ May have more complex implementation due to handling edge cases.

**Library Used:**
In this benchmark, there isn't a specific library used explicitly. However, `slice()` and `splice()` are built-in JavaScript methods that don't rely on external libraries.

**Special JS Feature/Syntax:**
There's no special JS feature or syntax mentioned in the benchmark. The code is straightforward JavaScript.

Now, regarding other alternatives:

* **`array.prototype.map()`**: While not directly used here, some people might consider using `map()` to create a new array with the desired elements and then using `filter()` to remove unwanted elements. However, this approach would have similar performance characteristics to `slice()`, and it's generally less efficient.
* **Other array methods**: Other methods like `concat()`, `set()`, or `reduce()` are not typically used for removing elements from an array.

Keep in mind that the choice of method depends on specific use cases, such as when the original array needs to be modified versus when a new array is preferred.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.2 Safari/605.1.15

Browser/OS: Safari 14 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
slice	2636219.0 Ops/sec
splice	4330055.0 Ops/sec

Related benchmarks:

Slice vs splice 2 ... (version: 0)

Comparing performance of: slice vs splice

Created: 3 years ago by: Guest

Jump to the latest result

slice

splice

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Sumamry (model llama3.2:3b, generated 2 days ago):