Benchmark: Pop vs Splice [fast]

Script Preparation code:

var list = [];

for(var i = 0; i < 200000; i++) list.push(i);

Tests:

splice
list.splice(0, list.length);
pop
while(list.length > 0) { list.pop(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
splice
pop

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser/OS: Chrome 110 on Windows

View result in a separate tab

Test name	Executions per second
splice	4910114.5 Ops/sec
pop	12201181.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the explanation for you.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark test case on MeasureThat.net. The benchmark is designed to compare the performance of two different methods: `splice` and `pop`.

**Options Compared**

Two options are compared:

1. **`splice`**: This method modifies the original array by removing elements from both ends (0-based indexing).
2. **`pop`**: This method removes the last element from the end of an array without modifying the original array.

**Pros and Cons**

### `splice`

Pros:

* Allows for dynamic removal of elements at any position in the array.
* Can be used to remove multiple elements at once.

Cons:

* Modifies the original array, which can lead to unexpected side effects if not handled properly.
* Has a higher overhead due to the need to update the array's length and indices.

### `pop`

Pros:

* Does not modify the original array, ensuring that the data remains intact.
* More predictable and easier to reason about, as it only removes elements from the end of the array.

Cons:

* Only allows for removal of the last element in the array.
* Can lead to memory issues if the array is very large, as all elements need to be stored in memory before they can be removed.

**Library Usage**

Neither `splice` nor `pop` rely on any external libraries. They are built-in JavaScript methods that operate directly on arrays.

**Special JS Features or Syntax**

There are no specific JavaScript features or syntax used in this benchmark that would require special handling.

**Other Alternatives**

In a real-world scenario, you might consider alternative approaches to removing elements from an array:

* **`shift()`**: Removes the first element from the start of an array and returns it. It has similar performance characteristics to `pop`.
* **`concat()`**: Creates a new array by copying elements from another array or iterable.
* **`slice()`**: Returns a subset of an array.

For larger datasets, you might also consider using data structures like linked lists, arrays with built-in garbage collection, or external libraries optimized for performance (e.g., `lodash`).

Keep in mind that the choice of method depends on the specific requirements and constraints of your project.

Related benchmarks:

Pop vs Splice [fast] (version: 0)

Comparing performance of: splice vs pop

Created: one year ago by: Guest

Jump to the latest result

splice

pop

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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