Benchmark: Some vs. Filter vs. indexOffdsfdsfds

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.findIndex(v => v === 0) > -1 : withoutZero.findIndex(v => v === 0) > -1 ;
Array.indexOf
var tempResult = !!Math.round(Math.random()) ? hasZero.indexOf(0) > -1 : withoutZero.indexOf(0) > -1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

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.

**Overview of the Benchmark**

The provided JSON represents a JavaScript microbenchmark that compares three different approaches to check if an array contains a specific value: `Array.some()`, `Array.filter()`, and `Array.indexOf()`.

**Approaches Compared**

1. **Array.some()**: This method returns `true` if at least one element in the array satisfies the provided condition. In this case, it's used to check if any element in the `hasZero` or `withoutZero` arrays is equal to 0.
2. **Array.filter()**: This method creates a new array with all elements that satisfy the provided condition. It's not directly applicable here, as we're only interested in checking for presence, not filtering out values. However, some implementations of `filter()` may optimize for presence by using an index-based approach.
3. **Array.indexOf()**: This method returns the index of the first element that satisfies the provided condition, or -1 if no such element exists. In this case, it's used to check if 0 is present in either array.

**Pros and Cons**

*   **Array.some()**:
    *   Pros: Simple and straightforward implementation.
    *   Cons: May be slower than `Array.indexOf()` for large arrays, as it iterates over the entire array.
*   **Array.filter()**: (As mentioned earlier, this is not directly applicable here.)
    *   Pros: Can be optimized for presence by using an index-based approach.
    *   Cons: This implementation is not explicitly shown in the benchmark, and its performance may vary depending on the JavaScript engine and version used.
*   **Array.indexOf()**:
    *   Pros: Generally faster than `Array.some()` for large arrays, as it can terminate early once it finds the element or determines that it doesn't exist.
    *   Cons: May have issues with edge cases (e.g., negative numbers) if not implemented carefully.

**Library Used**

None of the libraries are explicitly mentioned in the benchmark definition. However, `Math.round()` and `Math.random()` are built-in JavaScript functions that don't rely on external libraries.

**Special JS Features or Syntax**

There's no special JavaScript feature or syntax used in this benchmark. It only uses standard JavaScript features and syntax.

**Other Alternatives**

For checking if an array contains a specific value, other alternatives include:

*   **Array.includes()**: This method returns `true` if the specified value is present in the array. It was introduced in ECMAScript 2019.
*   **Set**: You can use a Set to store unique values and then check for membership using the `has()` method or the `in` operator.
*   **Binary Search**: If you're working with sorted arrays, binary search can be an efficient way to find a specific value.

Keep in mind that the performance of these alternatives may vary depending on the JavaScript engine, version, and array size.

Related benchmarks:

Some vs. Filter vs. indexOffdsfdsfds (version: 0)

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

Created: 2 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

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):