Benchmark: Some vs. Filter vs. findIndex - 1

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)
}
var numToSearch = Math.round(Math.random());

Tests:

Array.some
var tempResult = !!numToSearch ? hasZero.some(v => v === 0) : withoutZero.some(v => v === 0);
Array.filter
var tempResult = !!numToSearch ? hasZero.filter(v => v === 0) : withoutZero.filter(v => v === 0);
Array.findIndex
var tempResult = !!numToSearch ? hasZero.findIndex(v => v === 0) : withoutZero.findIndex(v => v === 0);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.some
Array.filter
Array.findIndex

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

LLMs can make mistakes. Check important info.

This benchmark tests the performance of three different approaches to find a specific value in an array:

**1. `Array.some()`:** This method checks if at least one element in an array satisfies a given condition. In this case, it's checking if the target value (`numToSearch`) exists within either `hasZero` (which may contain zeros) or `withoutZero` (which excludes zeros).

**2. `Array.filter()`:** This method creates a new array containing only elements from the original array that satisfy a given condition.  It's used here to filter for the target value in both `hasZero` and `withoutZero`.

**3. `Array.findIndex()`:** This method returns the index of the first element in an array that satisfies a given condition. It directly finds the index of the target value within both `hasZero` and `withoutZero`.

**Pros & Cons:**

* **`Array.some()`**:
    * **Pro:** Simple to implement, good for checking if *any* element meets a condition.
    * **Con:** Doesn't directly return the index of the found value; you might need additional logic if you require the index.
* **`Array.filter()`**: 
    * **Pro:** Returns a new array with the filtered values, which can be useful for further processing.
    * **Con:**  Can potentially create more overhead due to creating a new array. Might not be ideal if you only need the presence or absence of the target value.
* **`Array.findIndex()`**: 
    * **Pro:** Directly returns the index, which is efficient if you need the specific location of the value.
    * **Con:** Only returns the index of the *first* matching element. If multiple matches exist, it only considers the first one.

**Other Considerations:**

* **Size of the array:** For larger arrays, `Array.findIndex()` can be more efficient than iterating through an entire array with `Array.some()` or filtering with `Array.filter()`.
* **Frequency of use:** If you frequently need to find the index of a value, `Array.findIndex()` might be the most suitable choice.

**Alternatives:**

* **Using a loop:** For very small arrays or specific requirements, you could manually iterate through the array using a `for` loop. This offers fine-grained control but can be less efficient for larger arrays.
* **Third-party libraries:** Some JavaScript libraries offer optimized search functions that might perform better than built-in methods for specific use cases.

Let me know if you have any more questions!

Related benchmarks:

Some vs. Filter vs. findIndex - 1 (version: 0)

Comparing performance of: Array.some vs Array.filter vs Array.findIndex

Created: 3 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.findIndex

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model gemma2:9b, generated one year ago):