Benchmark: slice VS splice - 222222

Script Preparation code:

var list = [];
for (var i = 0; i < 1000 * 100; i++) {
  list.push(i);
}

Tests:

slice
list.push('slice'); list = list.slice(3000);
splice
list.push('splice'); list.splice(0, 3000);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
splice

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 dive into the world of MeasureThat.net and analyze the provided benchmark.

**Benchmark Definition**

The benchmark is defined by a JSON object that describes two test cases: `slice` and `splice`. The script preparation code creates an array `list` with 1 million elements, and then pushes the strings "slice" or "splice" onto it. After pushing, one of the methods (`slice()` or `splice()`) is called on the list to remove the first 3,000 elements.

**Options Compared**

The two options being compared are:

* `slice()`: This method returns a shallow copy of the string array.
* `splice()`: This method removes the specified number of elements from the string array and returns an array of removed elements.

**Pros and Cons of Each Approach**

* **slice()**: Pros:
	+ Creates a new array, so it doesn't modify the original list.
	+ May be faster since it only creates a copy of the required portion of the list.
Cons:
	+ Creates a new array, which can be slower than modifying the existing one.
* `splice()`: Pros:
	+ Modifies the original list in place, so less memory is allocated.
Cons:
	+ Removes elements from the original list, which may affect other parts of the code.

**Library and Its Purpose**

In the provided benchmark definition, there is no explicit mention of a library. However, the `slice()` method is a built-in JavaScript method for creating a shallow copy of an array or string.

**Special JS Feature/Syntax**

There is no special JavaScript feature or syntax used in this benchmark that requires explanation.

**Other Alternatives**

If you're interested in exploring alternative approaches to this benchmark, here are a few options:

* Using `Array.prototype.filter()` instead of `splice()`: This method creates a new array with elements that pass the test implemented by the provided function.
* Using `Array.prototype.map()` and then concatenating the resulting arrays: This approach would be slower than using `slice()` or `splice()`, as it involves more memory allocation and copying.

It's worth noting that MeasureThat.net often uses simple, straightforward approaches to benchmarks, so alternatives might not provide significant improvements over the original implementation.

Related benchmarks:

slice VS splice - 222222 (version: 0)

100k list splice and shift win, they mutate list slice loose, it creates a copy of list 7.5x slower

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>

Fastest: N/A

Slowest: N/A

No previous run results

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