Benchmark: find vs findIndex (Array prototype methods) 22

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) > -1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:85.0) Gecko/20100101 Firefox/85.0

Browser/OS: Firefox 85 on Windows

View result in a separate tab

Test name	Executions per second
Array.prototype.find	1950.5 Ops/sec
Array.prototype.findIndex	1897.9 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 provided benchmark definition and test cases to understand what's being tested.

**Benchmark Definition:**

The benchmark is testing two methods on the Array prototype:

1. `find`: Returns the value of the first element in an array that satisfies the provided testing function.
2. `findIndex`: Returns the index of the first element in an array that satisfies the provided testing function, or -1 if no element satisfies it.

**Options Compared:**

The benchmark is comparing the performance of these two methods:

* `Array.prototype.find`
* `Array.prototype.findIndex`

**Pros and Cons of Different Approaches:**

Both methods have their pros and cons:

1. `find`:
	* Pros:
		+ More intuitive and readable, as it searches for a specific value.
		+ Can be used with a callback function that doesn't necessarily return a boolean value.
	* Cons:
		+ Returns the first element found, which may not be what's expected if multiple elements match.
2. `findIndex`:
	* Pros:
		+ Returns an index, which can be useful for iterating over the array.
		+ More accurate than `find`, as it returns -1 if no element matches, whereas `find` returns the first matched element.
	* Cons:
		+ Less intuitive and readable, as it requires understanding of indexing.

**Library:**

None are used in this benchmark.

**Special JS Feature/Syntax:**

The testing function for both methods uses a shorthand method to check if an element is equal to 1E5 (`item == 1E5`). This syntax is valid JavaScript but is more commonly used in strict mode or with explicit type checking. In standard JavaScript, it's written as `item === 1E5` or `item == 1E5` (note the loose equality).

**Other Alternatives:**

For these specific methods, other alternatives are:

* Instead of using `find` and `findIndex`, you could use other methods like `some()` or `every()`.
* If performance is critical, you might consider using optimized array methods like `Array.prototype.some()` or `Array.prototype.every()`, which can be faster for large arrays.
* For iterating over an array, you could also use a simple `for` loop.

Keep in mind that the best approach depends on your specific use case and requirements.

Related benchmarks:

find vs findIndex (Array prototype methods) 22 (version: 0)

Measuring which is faster

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

Created: 4 years ago by: Guest

Jump to the latest result

Array.prototype.find

Array.prototype.findIndex

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):