Benchmark: Slice, splice, and filter

Script Preparation code:

var test=Array.from({length: 1000},()=>Math.random());
test.push(7777);

Tests:

Slice
const indexOf7s = test.indexOf(7777); [...test.slice(0,indexOf7s), ...test.slice(indexOf7s + 1)];
Splice
const indexOf7s = test.indexOf(7777); test.splice(indexOf7s, 1);
Filter
test.filter((e)=>3!=7777);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Slice
Splice
Filter

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.

I'll break down the explanation into smaller sections to make it easier to understand.

**Benchmark Overview**

MeasureThat.net is a website where users can create and run JavaScript microbenchmarks. The provided JSON represents a benchmark that tests three different approaches for removing an element from an array in JavaScript: `slice`, `splice`, and `filter`.

**Options Being Compared**

The benchmark compares the performance of three different methods:

1. **Slice**: Using the `slice()` method to create a new array with elements before the index where the element is located.
2. **Splice**: Using the `splice()` method to remove an element from the original array.
3. **Filter**: Using the `filter()` method to create a new array with elements that do not match the condition specified.

**Pros and Cons of Each Approach**

1. **Slice**:
	* Pros: Creates a new array, which can be faster than modifying the original array.
	* Cons: Requires additional memory allocation and copying of data.
2. **Splice**:
	* Pros: Modifies the original array in place, which can be faster for large arrays.
	* Cons: May modify other parts of the array unexpectedly if not used carefully.
3. **Filter**:
	* Pros: Creates a new array with only the desired elements, which can be faster than modifying the original array.
	* Cons: Can create a new array with more memory usage.

**Library and Purpose**

The `Array.prototype` library is used throughout the benchmark. This library provides various methods for manipulating arrays, such as `slice()`, `splice()`, and `filter()`.

**Special JS Features or Syntax (None)**

There are no special JavaScript features or syntax used in this benchmark. The code is straightforward and uses standard JavaScript constructs.

**Other Alternatives**

If you were to implement an alternative approach for removing elements from an array, some options could be:

1. Using `map()` with a callback function that returns `undefined` for the desired element.
2. Using `forEach()` with a callback function that returns `true` for the desired element and `false` otherwise.
3. Using a custom implementation using bitwise operations or other advanced techniques.

Keep in mind that these alternatives might not be as efficient or readable as the approaches used in this benchmark, but they could provide an interesting alternative perspective on the problem.

I hope this explanation helps! Let me know if you have any further questions.

Related benchmarks:

Slice, splice, and filter (version: 0)

JS array element removal

Comparing performance of: Slice vs Splice vs Filter

Created: 5 years ago by: Guest

Jump to the latest result

Slice

Splice

Filter

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):