Benchmark: Some vs. Filter vs. indexOf vs. includes vs conversation object

Script Preparation code:

var hasZero = [];
var withoutZero = [];
for (var i = 0; i < 10000; i++) {
  hasZero.push(Math.floor(Math.random() * 1000));
  withoutZero.push(Math.floor(Math.random() * 1000) + 1)
}

Tests:

Array.some
var tempResult = !!Math.round(Math.random()) ? hasZero.some(v => v === 0) : withoutZero.some(v => v === 0);
Array.filter
var tempResult = !!Math.round(Math.random()) ? hasZero.filter(v => v === 0) : withoutZero.filter(v => v === 0);
Array.indexOf
var tempResult = !!Math.round(Math.random()) ? hasZero.indexOf(0) > -1 : withoutZero.indexOf(0) > -1;
Array.includes
var tempResult = !!Math.round(Math.random()) ? hasZero.includes(0) : withoutZero.includes(0);
conversation
let hasSet = new Set(hasZero); let withoutSet = new Set(withoutZero); var tempResult = !!Math.round(Math.random()) ? hasSet.has(0) : withoutSet.has(0);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.some
Array.filter
Array.indexOf
Array.includes
conversation

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark and its test cases.

**Benchmark Overview**

The benchmark measures the performance of four different approaches to check if an array contains a specific value: `Array.some`, `Array.filter`, `Array.indexOf`, and `Array.includes`. The arrays are populated with random integers, some of which are zero. Two sets of arrays are used: one with zeros (`hasZero`) and one without zeros (`withoutZero`).

**Approaches**

1. **Array.some**: This method returns `true` if at least one element in the array passes the test implemented by the provided function.
2. **Array.filter**: This method creates a new array with all elements that pass the test implemented by the provided function.
3. **Array.indexOf**: This method returns the index of the first element in the array that passes the test implemented by the provided function. If no such element is found, it returns -1.
4. **Array.includes**: This method returns `true` if an element with the specified value exists in the array, otherwise `false`.

**Pros and Cons**

* **Array.some**: Pros:
	+ Simple to implement
	+ Fast for large arrays (O(n))
* Cons:
	+ May be slower than other methods for small arrays due to the need to iterate over all elements.
* **Array.filter**: Pros:
	+ Returns a new array with filtered elements, which can be useful in some cases.
	+ Faster than `Array.some` for large arrays (O(n)).
* Cons:
	+ Creates a new array, which can be memory-intensive.
	+ May be slower than `Array.indexOf` and `Array.includes` for small arrays due to the overhead of creating a new array.
* **Array.indexOf**: Pros:
	+ Fastest method for small arrays (O(1))
	+ Returns the index of the first element that passes the test, which can be useful in some cases.
* Cons:
	+ May return -1 if no such element is found.
* **Array.includes**: Pros:
	+ Fastest method for large arrays (O(n))
	+ Returns a boolean value indicating whether the element exists in the array.
* Cons:
	+ May not be suitable for use cases where the order of elements matters.

**Special Features and Libraries**

None of the test cases use special JavaScript features or libraries beyond the built-in `Array` methods.

**Other Alternatives**

If you need to check if an array contains a specific value, other alternatives include:

* **Using a loop**: Implementing a custom loop to iterate over the array and check each element.
* **Using a library like Lodash**: Using a utility library like Lodash, which provides additional functions for working with arrays, including `some`, `filter`, `indexOf`, and `includes`.
* **Using a native method in other languages**: Depending on the language, there may be a native method or function that achieves the same result. For example, in Python, you can use the `in` operator to check if an element is in a list.

I hope this explanation helps!

Related benchmarks:

Some vs. Filter vs. indexOf vs. includes vs conversation object (version: 0)

Comparing performance of: Array.some vs Array.filter vs Array.indexOf vs Array.includes vs conversation

Created: 3 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

Array.includes

conversation

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):