Benchmark: Some vs Filter vs indexOf vs Includes vs Find (2)

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
hasZero.some(v => v === 0)
Array.filter
hasZero.filter(v => v === 0)
Array.indexOf
hasZero.indexOf(0) > -1
Array.includes
hasZero.includes(0)
Array.find
hasZero.find(v => v === 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
Array.find

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

The provided benchmark is designed to test the performance of various methods for searching and filtering arrays in JavaScript.

Here's an explanation of each method compared:

1. `some(v => v === 0)`: This method uses the `Array.prototype.some()` method, which returns a boolean value indicating whether at least one element in the array satisfies the provided condition.
2. `filter(v => v === 0)`: This method uses the `Array.prototype.filter()` method, which returns a new array containing only the elements that satisfy the provided condition.
3. `indexOf(0) > -1`: This method uses the `Array.indexOf()` method, which returns the index of the first occurrence of the specified value in the array, or -1 if it's not found. The comparison `> -1` is used to determine if 0 exists in the array.
4. `includes(0)`: This method uses the `Array.prototype.includes()` method, which returns a boolean value indicating whether the array contains the specified value.
5. `find(v => v === 0)`: This method uses the `Array.prototype.find()` method, which returns the first element in the array that satisfies the provided condition.

Now, let's discuss the pros and cons of each approach:

* **`some()`**: Pros: concise and readable; can be used for multiple conditions. Cons: may not be as efficient as other methods since it has to iterate through the entire array.
* **`filter()`**: Pros: returns a new array with filtered elements, making it easier to work with the result. Cons: creates a new array, which can lead to memory issues for large arrays; slower than `indexOf()` and `includes()`.
* **`indexOf()`**: Pros: efficient and fast, especially when used with exact values like 0 or 1. Cons: returns an index value instead of a boolean result.
* **`includes()`**: Pros: simple and readable; always returns a boolean value. Cons: may be slower than `indexOf()` for large arrays since it has to scan the entire array.
* **`find()`**: Pros: finds the first occurrence, making it useful when you know the expected result is at index 0. Cons: can be slower than other methods due to its overhead.

Other considerations:

* The use of `Math.floor(Math.random() * 1000)` generates random numbers between 0 and 999, which are then pushed onto the arrays. This helps distribute the values evenly and reduces biases.
* The arrays `hasZero` and `withoutZero` have different distributions of values (0s and non-0s), respectively. This allows for a more accurate comparison of the methods.

Library/Lodash usage: None mentioned in this benchmark definition.

Special JavaScript features/syntax:

None explicitly mentioned, but it's worth noting that `find()` was introduced in ECMAScript 2012.

Alternatives:

* For arrays with many duplicates or sparse values, you might consider using `includes()` or a custom implementation.
* When searching for exact matches, `indexOf()` and `includes()` are usually the best choices.
* If you need to find multiple values or have more complex filtering logic, `some()`, `filter()`, or custom implementations might be better suited.

Keep in mind that these alternatives depend on specific use cases and performance requirements.

Related benchmarks:

Some vs Filter vs indexOf vs Includes vs Find (2) (version: 0)

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

Created: 4 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

Array.includes

Array.find

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):