Benchmark: find vs findIndex vs some (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 index = arr.some(item => item == 1E5);

Historical Performance Data aggregated from 132 community runs

Desktop Results:

Chrome 117 runs

Array.prototype.findIndex

2K/s

Array.prototype.find

2K/s

Array.prototype.some

2K/s

View exact numbers

✓ Array.prototype.findIndex: 1,846 ops/sec
• Array.prototype.find: 1,819 ops/sec
• Array.prototype.some: 1,751 ops/sec

Firefox 15 runs

Array.prototype.findIndex

3K/s

Array.prototype.find

3K/s

Array.prototype.some

3K/s

Fastest: Array.prototype.findIndex (1.1x faster)

View exact numbers

✓ Array.prototype.findIndex: 3,387 ops/sec
• Array.prototype.find: 3,103 ops/sec
• Array.prototype.some: 3,032 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

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 month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36

Browser/OS: Chrome 150 on Mac OS X 10.15.7

View result in a separate tab

Array.prototype.findIndex

2K/s

Array.prototype.some

2K/s

Array.prototype.find

2K/s

View exact numbers

Test name	Executions per second
✓ Array.prototype.findIndex	1,732 Ops/sec
Array.prototype.some	1,680 Ops/sec
Array.prototype.find	1,513 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what is tested in the provided JSON and explain the options, pros, and cons of each approach.

**Benchmark Definition**

The benchmark measures the performance of three different methods for finding an element in an array:

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

These methods are all part of the ECMAScript standard, which is the official specification for JavaScript.

**Options Compared**

The options compared are:

* `find()`: Returns the first element in the array that satisfies the provided condition.
* `findIndex()`: Returns the index of the first element in the array that satisfies the provided condition. If no such element exists, it returns -1.
* `some()`: Returns true if at least one element in the array satisfies the provided condition; otherwise, it returns false.

**Pros and Cons**

Here are some pros and cons of each approach:

* `find()`:
	+ Pros: Simple to use, fast for most cases.
	+ Cons: May throw an error if no element satisfies the condition. Also, may have performance issues if the array is very large.
* `findIndex()`:
	+ Pros: Returns a specific index value, which can be useful in some cases. More efficient than `some()` for arrays with many elements.
	+ Cons: May be slower than `find()` for most use cases. Also, may have performance issues if the array is very large.
* `some()`:
	+ Pros: Returns a boolean value, which can be useful in some cases. Can be more efficient than `find()` or `findIndex()` for arrays with many elements.
	+ Cons: May not be as straightforward to use as `find()` or `findIndex()`.

**Library**

There is no library explicitly used in this benchmark. However, it's worth noting that the `Array.prototype` methods are all part of the ECMAScript standard and do not rely on any external libraries.

**Special JS Feature/Syntax**

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

**Other Considerations**

When choosing an approach, consider the following:

* If you need to find a specific element in an array, `find()` might be the best choice.
* If you need to get the index of an element in an array, `findIndex()` is likely the better option.
* If you need to check if at least one element in an array satisfies a condition, `some()` can be a good choice.

**Alternatives**

If you're looking for alternative methods or approaches, consider the following:

* Using other data structures, such as sets or maps, might provide faster lookup times for certain use cases.
* Optimizing the `find()`, `findIndex()`, and `some()` methods using techniques like caching or memoization might improve performance in specific scenarios.
* Using a different programming language or library that provides optimized array operations might be beneficial in certain situations.

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

find vs findIndex vs some (Array prototype methods) (version: 0) Benchmark.js

Measuring which is faster

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

Created: 4 years ago by: Guest

Go to the latest result

Array.prototype.find

Array.prototype.findIndex

Array.prototype.some

Historical Performance Data aggregated from 132 community runs

Desktop Results:

Chrome 117 runs

Firefox 15 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

find vs findIndex vs some (Array prototype methods) (version: 0) Benchmark.js

Measuring which is faster

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

Created: 4 years ago by: Guest

Go to the latest result

Array.prototype.find

Array.prototype.findIndex

Array.prototype.some

Historical Performance Data aggregated from 132 community runs

Desktop Results:

Chrome 117 runs

Firefox 15 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

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