Benchmark: Array pop vs Set iterator fixed

Script Preparation code:

var arr = [];
var set = new Set();
for(let i = 0; i < 1000; i++) {
  arr.push(i);
  set.add(i);
}

Tests:

Array pop
for(let i = 0; i < 1000; i++) { let x = arr.pop(); }
Set.values.next() + delete()
for(let i = 0; i < 1000; i++) { let x = set.values().next(); if(x.value !== undefined) { set.delete(x); } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array pop
Set.values.next() + delete()

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question tests two approaches for removing elements from an array: using `Array.prototype.pop()` and using the iterator API (`set.values()` and `next()`).

**Options Compared**

The benchmark compares two options:

1. **Array pop**: Using `Array.prototype.pop()` to remove elements from the array.
2. **Set values.next() + delete()**: Using the iterator API to iterate over the set's values, calling `next()` to retrieve the next value, and then deleting the value using `set.delete()`.

**Pros and Cons of Each Approach**

### Array Pop

Pros:

* Simple and well-known approach.
* Easy to understand and implement.

Cons:

* Can lead to slower performance due to the overhead of searching for the last element in the array.

### Set Values.next() + Delete()

Pros:

* More efficient than `Array.prototype.pop()` because it avoids the search operation.
* Can be faster for large sets, as it uses an iterator to retrieve elements one by one.

Cons:

* Requires a deeper understanding of the iterator API and set operations.
* May have additional overhead due to the use of `next()` and `delete()` methods.

**Library: Set**

The benchmark uses the built-in `Set` object in JavaScript. A set is a collection of unique values, which makes it useful for removing elements quickly and efficiently.

The `set.values()` method returns an iterator that yields the values of the set, one by one. The `next()` method is used to retrieve the next value from the iterator. Once the value is retrieved, it can be deleted using the `set.delete()` method.

**Special JavaScript Feature/ Syntax: None**

This benchmark does not use any special JavaScript features or syntax that require specific understanding or knowledge.

**Other Alternatives**

If you were to implement a similar benchmark, you could also compare other approaches, such as:

* Using `Array.prototype.shift()` instead of `Array.prototype.pop()`.
* Using `Array.prototype splice()` with the `-1` index and the `2` argument set to `0` instead of deleting elements from the end of the array.
* Using a custom data structure, like a linked list or a binary search tree, to remove elements.

Keep in mind that these alternatives might have different performance characteristics and requirements for implementation.

Latest run results:

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

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:108.0) Gecko/20100101 Firefox/108.0

Browser/OS: Firefox 108 on Ubuntu

View result in a separate tab

Test name	Executions per second
Array pop	245755.1 Ops/sec
Set.values.next() + delete()	5857.3 Ops/sec

Related benchmarks:

Array pop vs Set iterator fixed (version: 1)

Comparing performance of: Array pop vs Set.values.next() + delete()

Created: one year ago by: Registered User

Jump to the latest result

Array pop

Set.values.next() + delete()

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):