Benchmark: Some vs. Filter vs. indexOf vs. Includes2 vs. Find

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);
Array.find
var tempResult = !!Math.round(Math.random()) ? hasZero.find(v => v === 0) : withoutZero.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

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down what's being tested in the provided JSON benchmark.

The test suite consists of six individual test cases, each measuring the performance of a different method to find an element in an array: `Array.some`, `Array.filter`, `Array.indexOf`, `Array.includes`, and `Array.find`.

**Options compared**

1. **`Array.some()`**: This method returns true if at least one element in the array passes the provided test.
2. **`Array.filter()`**: This method creates a new array with all elements that pass the provided test.
3. **`Array.indexOf()`**: This method returns the index of the first element in the array that matches the specified value, or -1 if no match is found.
4. **`Array.includes()`**: This method checks whether an element with the specified value exists in the array.
5. **`Array.find()`**: This method returns the value of the first element in the array that passes the provided test.

**Pros and cons**

*   `Array.some()`:
    *   Pros: efficient for finding at least one match, simple to use
    *   Cons: can be slow for large arrays because it iterates over the entire array
*   `Array.filter()`:
    *   Pros: creates a new array with all matches, easy to chain methods
    *   Cons: requires creating a new array, can be slower than some() or indexOf for finding a single element
*   `Array.indexOf()`:
    *   Pros: returns the index of the first match, efficient for finding a single element
    *   Cons: may not be suitable if you need to find all matches or if the array is very large because it requires linear search
*   `Array.includes()`:
    *   Pros: fast and simple to use, returns boolean result
    *   Cons: can be slower than indexOf for finding a single element
*   `Array.find()`:
    *   Pros: efficient for finding a single match, easy to use
    *   Cons: may not be suitable if you need to find all matches or if the array is very large because it requires linear search

**Libraries and special JS features**

None of these methods rely on any specific library. They are built-in JavaScript methods that can be used directly in most applications.

**Testers' considerations**

When choosing a method, consider the following:

*   Do you need to find all matches or just one?
*   How large is the array? For very large arrays, indexOf or includes might be more efficient.
*   Do you need to create a new array with all matches, or just return a boolean result?

**Alternatives**

If none of these methods meet your needs, consider using:

*   `Array.prototype.every()` for finding no matches
*   `Array.prototype.reduce()` for aggregating elements in the array

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36

Browser/OS: Chrome 90 on Windows

View result in a separate tab

Test name	Executions per second
Array.some	164126.4 Ops/sec
Array.filter	32939.1 Ops/sec
Array.indexOf	173132.9 Ops/sec
Array.includes	2451454.2 Ops/sec
Array.find	179538.7 Ops/sec

Related benchmarks:

Some vs. Filter vs. indexOf vs. Includes2 vs. Find (version: 0)

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

Created: 3 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>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):