Benchmark: Split vs slice vs 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.slice(1)
Splice
array.splice(0,1)
Shift
array.shift()
Set
set.delete()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Slice
Splice
Shift
Set

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):

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Let's break down the provided JSON and explain what's being tested in this JavaScript microbenchmark.

**Benchmark Definition**

The benchmark definition is created by the user using the `Script Preparation Code` and `Html Preparation Code`. In this case, both are empty. The script preparation code creates an array of 100 elements with indices ranging from 0 to 99 using the `map()` method and a callback function. It then creates a new `Set` object from this array.

**Individual Test Cases**

There are four test cases:

1. **Slice**: Tests the performance of the `array.slice(1)` method.
2. **Splice**: Tests the performance of the `array.splice(0,1)` method.
3. **Shift**: Tests the performance of the `array.shift()` method.
4. **Set**: Tests the performance of the `set.delete()` method.

**Options Compared**

The benchmark is comparing four different methods to remove elements from the array or set:

* **Slice**: creates a new array by excluding the first element (e.g., `[1, 2, ..., 99]`).
* **Splice**: removes the first element from the original array.
* **Shift**: removes and returns the first element from the original array.
* **Set**: uses the `delete()` method to remove elements from the set.

**Pros and Cons of Each Approach**

1. **Slice**:
	* Pros: fast, creates a new array, doesn't modify the original array.
	* Cons: requires creating a new array, can be slower for large arrays due to memory allocation.
2. **Splice**:
	* Pros: modifies the original array, can be faster than slice for small arrays.
	* Cons: modifies the original array, can be slower for large arrays due to shifting elements.
3. **Shift**:
	* Pros: fast, returns the removed element, doesn't modify the set.
	* Cons: requires creating a temporary variable to store the returned value, can be slower than splice for small arrays.
4. **Set**:
	* Pros: uses an optimized data structure, can be faster than the above methods for large sets.
	* Cons: requires using a different data structure and method, may not be familiar to all developers.

**Other Considerations**

The benchmark is testing the performance of these methods in a desktop browser (Firefox 115) on a Mac OS X 10.15 machine. The results are likely to vary depending on the environment and specific hardware.

**Libraries Used**

None explicitly mentioned, but `Set` uses the built-in JavaScript `Set` object.

No special JS features or syntax used in this benchmark.

**Alternatives**

Other alternatives to these methods could include:

* Using a different data structure, such as an array with a fixed size and a separate counter.
* Implementing a custom removal method using bitwise operations or other optimization techniques.
* Using a different programming paradigm, such as functional programming, which might offer more efficient solutions for set-based operations.

Related benchmarks:

Split vs slice vs Splice vs Set javascript (version: 0)

Comparing performance of: Slice vs Splice vs Shift vs Set

Created: 2 years ago by: Guest

Jump to the latest result

Slice

Splice

Shift

Set

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):