Benchmark: Some vs. Filter vs. indexOf

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);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

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**Benchmark Definition and Script Preparation Code**

The benchmark definition is a JSON object that describes the test case. In this case, we have four test cases:

1. `Array.some`
2. `Array.filter`
3. `Array.indexOf`
4. `Array.includes`

The script preparation code is used to generate an array of random integers for each test case. The code creates two arrays: `hasZero` and `withoutZero`. `hasZero` contains numbers between 0 and 1000, while `withoutZero` contains numbers between 1 and 1000 (inclusive). This setup ensures that at least one element in `hasZero` is always 0.

**Options Compared**

The test cases compare four different approaches:

1. `Array.some`
2. `Array.filter`
3. `Array.indexOf`
4. `Array.includes`

These methods are used to check if an array contains a specific value (in this case, the number 0).

**Pros and Cons of Each Approach**

Here's a brief overview of each approach:

1. **Array.some**: This method returns `true` as soon as it finds an element in the array that satisfies the provided condition. It stops iterating over the array once it finds a match.
	* Pros: Can be faster for small arrays or when the desired value is found early.
	* Cons: May not be efficient for large arrays where the desired value is scattered throughout.
2. **Array.filter**: This method creates a new array with all elements that satisfy the provided condition. It returns an empty array if no elements match.
	* Pros: Can be useful when you need to create a new array with filtered elements.
	* Cons: May be slower than `some` for small arrays or when the desired value is found early, as it requires creating a new array.
3. **Array.indexOf**: This method returns the index of the first element that satisfies the provided condition. If no element matches, it returns -1.
	* Pros: Can be faster than `some` or `filter` for small arrays, as it returns immediately when it finds the desired value.
	* Cons: May not be suitable for all use cases, as it only returns the index of the first matching element.
4. **Array.includes**: This method returns a boolean indicating whether the array contains the specified value.
	* Pros: Often faster than `indexOf` or `some`, as it's implemented in V8 and optimized for performance.
	* Cons: May not be suitable for all use cases, as it only checks if the array includes the desired value (not its index).

**Library and Purpose**

None of the libraries used in this benchmark are explicitly mentioned. However, it's worth noting that `Array.includes` is a relatively recent addition to the JavaScript standard library, introduced in ECMAScript 2019.

**Special JS Feature or Syntax**

There doesn't appear to be any special JavaScript features or syntax being tested in this benchmark. The focus is on comparing the performance of four different array methods.

**Other Alternatives**

If you're interested in exploring alternative array methods or libraries, here are a few options:

1. `Array.prototype.every()`: This method returns `true` if all elements in the array satisfy the provided condition.
2. `Array.prototype.reduce()`: This method applies a callback function to each element in the array and reduces it to a single value.
3. Third-party libraries like Lodash or Ramda, which provide additional utility functions for working with arrays.

Keep in mind that these alternatives may not be as widely supported as the standard JavaScript methods, and their performance may vary depending on the specific use case.

Related benchmarks:

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

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

Created: 7 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

Array.includes

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):