Benchmark: Filter through some or includes

Script Preparation code:

var arr = [];
for(var i = 0; i < 5000; i++) {
	arr[i] = i;
}
var setInit = [];
for(var i = 0; i < 5; i++) {
	setInit[i] = i+10;
}

Tests:

filter with some
var flt = arr.filter(v => setInit.some(fv => fv === v));
filter with includes
var flt = arr.filter(v => setInit.includes(v));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
filter with some
filter with includes

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

I'd be happy to help you understand what's being tested in the provided benchmark.

**Benchmark Description**

The benchmark measures the performance of two different approaches for filtering an array in JavaScript: `some()` and `includes()`. The benchmark is designed to simulate real-world usage scenarios where elements are added or removed from a set, causing the filter function to need re-computation.

**Script Preparation Code**

The script preparation code generates two arrays:

1. `arr`: An array of 5000 integers from 0 to 4999.
2. `setInit`: A set of 5 integers, starting from 10 and increasing by 10 each time (i.e., 10, 20, 30, 40, 50).

**Html Preparation Code**

The html preparation code is empty, which means the benchmark doesn't generate any HTML content.

**Individual Test Cases**

There are two test cases:

1. **Filter with some**: This test case uses the `some()` method to filter the `arr` array based on whether each element exists in the `setInit` set.
2. **Filter with includes**: This test case uses the `includes()` method to filter the `arr` array based on whether each element exists in the `setInit` set.

**Library and Purpose**

Neither of the libraries used in this benchmark is explicitly mentioned in the provided code. However, it's likely that the `some()` method is a built-in JavaScript method that checks if at least one element in an array satisfies a condition. The `includes()` method is also a built-in JavaScript method that checks if an element exists in an array.

**Special JS Feature or Syntax**

The benchmark doesn't explicitly use any special JavaScript features or syntax, but it's worth noting that the `some()` and `includes()` methods are commonly used in modern JavaScript code.

**Pros and Cons of Different Approaches**

Here are some pros and cons of each approach:

1. **some()**
	* Pros:
		+ Can short-circuit as soon as a condition is met.
		+ Can be faster for small arrays or sets.
	* Cons:
		+ May not work as expected if the array or set is modified while iterating over it.
		+ May not handle cases where the element is not found in the set efficiently.
2. **includes()**
	* Pros:
		+ More intuitive and readable than `some()`.
		+ Can be faster for large arrays or sets, since it uses a binary search algorithm under the hood.
	* Cons:
		+ May have higher overhead due to the use of binary search.
		+ May not work as expected if the array or set is modified while iterating over it.

**Other Alternatives**

Some other alternatives for filtering an array in JavaScript include:

1. **forEach()**: While not designed specifically for filtering, `forEach()` can be used with a callback function to achieve similar results.
2. **every()**: Similar to `some()`, but returns `true` if all elements satisfy the condition, rather than just one of them.
3. **map()**: Can be used in conjunction with other methods (e.g., `filter()`) to create a new array that meets certain conditions.

Overall, the choice between `some()` and `includes()` depends on the specific requirements of your use case and the performance characteristics you need to optimize for.

Related benchmarks:

Filter through some or includes (version: 0)

Comparing performance of: filter with some vs filter with includes

Created: 4 years ago by: Guest

Jump to the latest result

filter with some

filter with 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):