Benchmark: array using every vs includes vs some

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var array = [true,false]

Tests:

includes
!array.includes(true)
every
array.every(v => v===false)
some
!array.some(v => v)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
includes
every
some

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.6 Safari/605.1.15 Ddg/18.6

Browser/OS: Safari 18 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
includes	137864352.0 Ops/sec
every	121349328.0 Ops/sec
some	127799312.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the JavaScript microbenchmark provided by MeasureThat.net.

**Benchmark Overview**

The benchmark compares three different methods to check if an element exists in an array:

1. `every`
2. `includes`
3. `some`

These methods are often used to determine whether a certain condition is met for all or some elements in an array.

**Options Compared**

Here's a brief overview of each method:

1. **`every()`**: This method returns `true` if all elements of the array pass the provided test. In this case, the test checks if all elements are falsy (`v === false`). If any element is truthy, it will return `false`.
	* Pros: Efficient for arrays with a large number of elements where only one specific value needs to be checked.
	* Cons: May not be suitable for small arrays or when you need to check individual elements rather than the entire array.
2. **`includes()`**: This method returns `true` if an element is found in the array, and `false` otherwise.
	* Pros: Simple and intuitive, easy to read and maintain.
	* Cons: May be slower for very large arrays due to its iteration nature.
3. **`some()`**: This method returns `true` if at least one element passes the provided test. In this case, the test checks if any element is truthy (`v`). If no elements are truthy, it will return `false`.
	* Pros: Efficient for arrays with a small number of elements where only one specific value needs to be checked.
	* Cons: May not be suitable for large arrays or when you need to check individual elements rather than the entire array.

**Library Used**

The benchmark uses Lodash.js, a popular JavaScript library that provides a wide range of functional programming utilities. In this case, it's used for its `includes()` and `some()` functions.

**Special JS Features/Syntax**

This benchmark does not use any special JavaScript features or syntax beyond the standard ES6 syntax for array methods (`every()`, `includes()`, and `some()`).

**Other Alternatives**

If you need to check if an element exists in an array, here are some alternative approaches:

1. Manual iteration using a loop.
2. Using `Array.prototype.findIndex()` which returns the index of the first element that satisfies the condition, or -1 if no elements satisfy it.

Manual iteration would involve iterating over each element in the array and checking its value, while `Array.prototype.findIndex()` is more concise but may be slower due to its overhead.

Keep in mind that these alternatives are not as efficient as using built-in methods like `every()`, `includes()`, or `some()`.

Related benchmarks:

array using every vs includes vs some (version: 0)

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Comparing performance of: includes vs every vs some

Created: 3 years ago by: Guest

Jump to the latest result

includes

every

some

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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