Benchmark: array find vs array some

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.core.js"></script>

Script Preparation code:

var users = [
  { 'user': 'joey',  'age': 32 },
  { 'user': 'ross',    'age': 41 },
  { 'user': 'chandler', 'age': 39 }
]

Tests:

array find
!!users.find(function (o) { return o.age < 40; })
array some
users.some(function (o) { return o.age < 40; })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array find
array some

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the provided benchmark definition and explain what is being tested.

**What is being tested:**

The benchmark tests two ways to iterate over an array in JavaScript:

1. `Array.prototype.find()`: This method returns the first element of an array that satisfies a specified condition. In this case, it's used to find the user with an age less than 40.
2. `Array.prototype.some()`: This method returns `true` if at least one element of an array satisfies a specified condition. In this case, it's used to check if any user has an age less than 40.

**Options compared:**

The benchmark is comparing the performance of these two methods:

* `find()` vs `some()`

**Pros and Cons of each approach:**

* `Array.prototype.find()`:
	+ Pros:
		- Returns the first matching element, which can be useful if you're only interested in one value.
		- Can be faster than `some()` because it returns as soon as it finds a match.
	+ Cons:
		- May not be as efficient for large arrays since it stops iterating as soon as it finds a match.
* `Array.prototype.some()`:
	+ Pros:
		- Returns `true` if any element satisfies the condition, which can be useful for checking multiple values.
		- Can be more efficient for large arrays because it only requires a single pass through the array.
	+ Cons:
		- Returns `false` instead of an actual value, so you need to check its return type after calling `some()`.
		- May not be as fast as `find()` if the condition is complex and takes multiple iterations.

**Library used:**

The benchmark uses the Lodash library, which is a popular utility library for JavaScript. In this case, it's only loading the core functionality of the library (`lodash.core.js`).

**Special JS feature or syntax:**

There are no special JavaScript features or syntaxes being tested in this benchmark.

Now, let's consider other alternatives:

* If you're using a recent version of JavaScript (ECMAScript 2020+), you might be able to use `Array.prototype.find()` and `Array.prototype.some()` with more efficient algorithms.
* For very large arrays, you might want to consider using an alternative data structure like a streaming iterator or a Map/Reduce-based approach.
* If performance is critical, you could also explore using native JavaScript methods like `forEach()` and manipulating the array in place instead of using `Array.prototype.find()` or `Array.prototype.some()`.

Related benchmarks:

array find vs array some (version: 0)

Comparing performance of: array find vs array some

Created: 4 years ago by: Guest

Jump to the latest result

array find

array some

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):