Benchmark: Some vs. Filter vs. indexOf 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;
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
find

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser/OS: Chrome 131 on Windows

View result in a separate tab

Test name	Executions per second
Array.some	193661.7 Ops/sec
Array.filter	32080.5 Ops/sec
Array.indexOf	1334399.8 Ops/sec
find	254027.6 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

The provided JSON represents a benchmark test that compares the performance of four different methods to check if an array contains a specific value:

1. `Array.some()`
2. `Array.filter()`
3. `Array.indexOf()`
4. `find()`

These methods are compared in two variants: one using an empty array (`hasZero`) containing random integers, and the other using an array with at least one integer that is not present in the first array (`withoutZero`).

**Options Compared:**

1. `Array.some()`: This method returns a boolean value indicating whether at least one element in the array passes the provided test (in this case, checking if each number is equal to 0). It iterates over the array and as soon as it finds an element that passes the test, it returns `true`.
2. `Array.filter()`: This method creates a new array with all elements that pass the provided test (again, checking if each number is equal to 0). It returns an array of elements for which the callback function returned `true`.
3. `Array.indexOf()`: This method returns the index of the first element in the array that matches the specified value (in this case, 0) or -1 if no match is found.
4. `find()`: This method returns the first element in the array that passes the provided test (checking if each number is equal to 0).

**Pros and Cons:**

1. **Array.some()**: Pros:
	* Simple to implement
	* Works well for small arrays
Cons:
	* Can be slow for large arrays since it stops iterating as soon as it finds a match
2. **Array.filter()**: Pros:
	* Creates a new array, which can be more efficient than modifying the original array
	* Allows for further processing on the resulting array
Cons:
	* Requires creating a new array, which can consume additional memory
	* Can be slower due to the creation of a new array
3. **Array.indexOf()**: Pros:
	* Fast since it uses a linear search approach
Cons:
	* Returns an index, not the actual value
	* Can be slow for large arrays or arrays with many duplicates
4. **find()**: Pros:
	* Returns the first matching element, which can simplify the code
Cons:
	* May be slower than `Array.some()` since it needs to iterate over the array until a match is found

**Libraries and Special Features:**

None of these methods rely on external libraries or special JavaScript features.

**Other Considerations:**

1. **Array.prototype.forEach()**: Not mentioned in this benchmark, but an alternative method to check if all elements pass a test would be `forEach()` with the `every()` method.
2. **Caching and Memoization**: For performance-critical code, consider using caching or memoization techniques to store results of expensive function calls.

**Alternatives:**

1. **Lodash's `some()`, `filter()`, and `find()` methods**: While not directly mentioned in this benchmark, Lodash provides optimized versions of these methods that may be faster than the native JavaScript implementations.
2. **Other specialized libraries**: Depending on your specific use case, you might consider using specialized libraries like `lodash` or `ramda` which provide optimized implementations for common array operations.

In conclusion, the choice between `Array.some()`, `Array.filter()`, `Array.indexOf()`, and `find()` depends on your specific requirements and performance constraints. Consider factors like memory usage, iteration speed, and code simplicity when selecting an approach.

Related benchmarks:

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

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

Created: 5 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

find

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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