Benchmark: Some vs. Filter vs. findIndex with unassigned cells

Script Preparation code:

var hasZero = [];
var withoutZero = [];
for (var i = 0; i < 10000; i++) {
  if(Math.random() < 0.5) {
  	hasZero[i] = (Math.floor(Math.random() * 1000));
  } else {
  		withoutZero[i] = (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.findIndex
var tempResult = !!Math.round(Math.random()) ? 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 llama3.2:3b, generated one year ago):

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Let's dive into the world of JavaScript microbenchmarks.

**Benchmark Overview**

The provided benchmark tests three different methods for checking if an array contains a zero value: `Array.some()`, `Array.filter()`, and `Array.findIndex()`. These methods are compared to determine which one is the most efficient.

**Methods Compared**

1. **`Array.some()`**: This method returns `true` as soon as it finds an element in the array that satisfies the provided condition (in this case, `v === 0`). If no elements satisfy the condition, it returns `false`.
2. **`Array.filter()`**: This method creates a new array with all elements that pass the test implemented by the provided function (in this case, `v => v === 0`). It returns an empty array if no elements pass the test.
3. **`Array.findIndex()`**: This method returns the index of the first element in the array that satisfies the provided condition (in this case, `v === 0`). If no elements satisfy the condition, it returns -1.

**Pros and Cons**

*   **`Array.some()`**:
    *   Pros: Fast, easy to understand, and widely supported.
    *   Cons: Can be slow for very large arrays since it only stops iterating when it finds a match. Also, if no elements satisfy the condition, it returns `false`, which can be considered as "zero" in this context.
*   **`Array.filter()`**:
    *   Pros: Creates a new array with filtered elements, which can be useful in certain situations. It's also more explicit than `some()`.
    *   Cons: Can be slower than `some()` since it creates a new array, and if no elements pass the test, it returns an empty array.
*   **`Array.findIndex()`**:
    *   Pros: Returns the index of the first element that satisfies the condition, which can be useful for finding specific elements in the array. It's also more explicit than `some()`.
    *   Cons: Can be slower than `some()` since it iterates over the entire array to find a match. If no elements satisfy the condition, it returns -1.

**Library and Special JS Features**

There are no libraries or special JavaScript features mentioned in the provided benchmark definition or test cases.

**Other Alternatives**

In addition to the three methods compared in this benchmark, other alternatives for checking if an array contains a zero value include:

*   **`Array.every()`**: Returns `true` if all elements in the array satisfy the provided condition.
*   **`Array.includes()```**: Returns a boolean indicating whether the array includes the specified element (0).

These methods can be used in different situations, but they might not be as efficient or suitable for this specific use case as `Array.some()`, `Array.filter()`, and `Array.findIndex()`.

In summary, the benchmark provides a useful comparison of three common methods for checking if an array contains a zero value. The choice of method depends on the specific requirements of the project, such as performance, readability, and the need for explicit indexing or filtering results.

Related benchmarks:

Some vs. Filter vs. findIndex with unassigned cells (version: 0)

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

Created: 5 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 llama3.2:3b, generated one year ago):