Benchmark: find vs findIndex vs someeeeeeeeeeeeeeee (Array prototype methods)

Script Preparation code:

var arr = [];
var i = 0;

while (i <= 1E5) arr[i] = i++;

Tests:

Array.prototype.find
const item = arr.find(item => item == 1E5);
Array.prototype.findIndex
const index = arr.findIndex(item => item == 1E5);
Array.prototype.some
const exists = arr.some(item => item == 1E5);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.find
Array.prototype.findIndex
Array.prototype.some

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/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Windows

View result in a separate tab

Test name	Executions per second
Array.prototype.find	5201.5 Ops/sec
Array.prototype.findIndex	20083.2 Ops/sec
Array.prototype.some	5589.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is comparing three Array prototype methods:

1. `find()`
2. `findIndex()`
3. `some()`

These methods are used to perform different operations on arrays.

**Options Compared**

Here's a brief overview of each method:

* `find()` returns the first element in an array that satisfies the provided testing function.
	+ Pros: Simple to use, intuitive name.
	+ Cons: May return `undefined` if no elements match, which can lead to unexpected behavior.
* `findIndex()` returns the index of the first element in an array that satisfies the provided testing function.
	+ Pros: Returns a meaningful value (index) even if no elements match, making it easier to handle edge cases.
	+ Cons: May return `-1` if no elements match, which can be confusing.
* `some()` returns a boolean indicating whether at least one element in an array satisfies the provided testing function.
	+ Pros: Simple and concise, easy to use.
	+ Cons: Returns only a boolean value, making it less informative than `findIndex()`.
	+ Alternative names: `any()` or `has()`

**Library**

None of these methods rely on external libraries.

**Special JS Features**

There are no special JavaScript features or syntax used in this benchmark.

**Other Considerations**

When working with arrays and iterators, consider the following:

* Array methods can be affected by the size and structure of the input array.
* The testing function passed to `find()`, `findIndex()`, and `some()` must be a valid function reference (i.e., not a string or other type).

**Alternatives**

If you're looking for alternatives to these methods, consider:

* Using `Array.prototype.includes()` instead of `some()` if you only need to check for the presence of a single element.
* Using `Array.prototype.indexOf()` instead of `findIndex()` if you only need to get the index of a single element.

Keep in mind that these alternatives might not be suitable for all use cases, so carefully consider the trade-offs before choosing an alternative.

Related benchmarks:

find vs findIndex vs someeeeeeeeeeeeeeee (Array prototype methods) (version: 0)

Measuring which is faster

Comparing performance of: Array.prototype.find vs Array.prototype.findIndex vs Array.prototype.some

Created: one year ago by: Guest

Jump to the latest result

Array.prototype.find

Array.prototype.findIndex

Array.prototype.some

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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