Benchmark: spread array performance (vs slice, splice, concat, filter)

Tests:

Splice
const testArray = [1, 2, 3, 4, 5, 6, 7, 8, 9]; const newTestArray = testArray.splice(testArray.indexOf(6),1);
Slice
const testArray = [1, 2, 3, 4, 5, 6, 7, 8, 9]; const newTestArray = [...testArray.slice(0,testArray.indexOf(6)),...testArray.slice(testArray.indexOf(6)+1)];
Concat
const testArray = [1, 2, 3, 4, 5, 6, 7, 8, 9]; const newTestArray = testArray.slice(0,testArray.indexOf(6)).concat(testArray.slice(testArray.indexOf(6)+1));
For
const testArray = [1, 2, 3, 4, 5, 6, 7, 8, 9]; const newTestArray = testArray.filter((item) => { if (item !== 6){ return item } });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Splice
Slice
Concat
For

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark and analyze the different options being compared.

**Benchmark Overview**

The benchmark measures the performance of three different methods to extract a specific element from an array:

1. `Splice`: Removing the element at a specified index using `splice`.
2. `Slice`: Creating a new array by extracting a range of elements using `slice`.
3. `Concat`: Merging two arrays created using `slice` and then concatenating them.

**Pros and Cons**

* **Splice**: This method is simple and efficient, but it can be expensive in terms of performance because it modifies the original array.
	+ Pros: Fast, easy to implement.
	+ Cons: Modifies the original array, can be slower than other methods.
* **Slice**: Creating a new array using `slice` is generally faster than modifying the original array. However, creating an empty array and concatenating two arrays can be slower if the slice size is large.
	+ Pros: Fast, creates a new array.
	+ Cons: Can create intermediate arrays, may be slower for large slices.
* **Concat**: This method involves creating two arrays using `slice` and then merging them. It's often slower than other methods because it requires more memory allocations and copies.
	+ Pros: Easy to understand, readable code.
	+ Cons: Slowest of the three methods.

**Library**

None of the test cases use any external libraries. The benchmark only relies on the built-in JavaScript array methods.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax used in these benchmark cases. They use standard JavaScript syntax to create arrays, perform operations, and extract elements.

**Alternatives**

If you're looking for alternative approaches, here are a few:

* **Array.prototype.map()`: Instead of using `slice` and concatenating two arrays, you can use `map()` to create a new array with the desired element.
* **Array.prototype.reduce()`: Another approach is to use `reduce()` to extract the desired element from the original array.

However, these alternatives might not be as straightforward or efficient as the original methods being compared in this benchmark.

Overall, the benchmark provides a good comparison of three common methods for extracting elements from an array. By analyzing the pros and cons of each method, you can choose the best approach for your specific use case.

Related benchmarks:

spread array performance (vs slice, splice, concat, filter) (version: 0)

Comparing performance of: Splice vs Slice vs Concat vs For

Created: 3 years ago by: Guest

Jump to the latest result

Splice

Slice

Concat

For

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):