Benchmark: Filter vs indexOf Speed small sized array 7899432423

Script Preparation code:


var testArray = [];
for (var i = 0; i <25; i++) {
  testArray.push(Math.floor(i * 25) + 1)
}

Tests:

remove finding element using indexof
function removeElement(testArray, element) { return ( index = testArray.indexOf(element) !==-1) ? testArray.splice(index, 1):0; } removeElement(testArray, 24);
remove finding element using filter
function removeElement(testArray, element) { return testArray.filter(s => s !== element); } removeElement(testArray, 24);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
remove finding element using indexof
remove finding element using filter

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
remove finding element using indexof	8318450.0 Ops/sec
remove finding element using filter	12084387.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The benchmark definition is a JSON object that describes the test case:

* `Name`: A unique name for the benchmark (Filter vs indexOf Speed small sized array 7899432423)
* `Description`: A brief description of the test case (Filter vs indexOf in array remove element Javascript)

**Script Preparation Code**

This code snippet creates an array `testArray` with 25 elements, each element being a number between 1 and 50. This array will be used as input for both benchmark tests.

**Html Preparation Code**

Since there is no HTML preparation code provided, this means that the test case only relies on JavaScript and doesn't require any specific HTML structure or content.

**Individual Test Cases**

There are two test cases:

1. **remove finding element using indexof**: This test case uses the `indexOf` method to find the index of a specified element (in this case, 24) in the `testArray`. If the element is found, it returns the modified array by splicing out the element at that index.
2. **remove finding element using filter**: This test case uses the `filter` method to create a new array with all elements from the original array except for the specified element (in this case, 24).

**Benchmark Preparation Code**

This code snippet is used to prepare both benchmark tests:

* For both tests, it creates an instance of the `removeElement` function and calls it twice: once with the filter method and once with the indexOf method.

**Library: Splice**

The `splice` method is a built-in JavaScript array method that modifies the original array by removing or adding elements. It's used in the `removeElement` function when the element is found at a specific index.

**Pros/Cons of each approach:**

* **indexOf**: This method searches for the first occurrence of an element in the array and returns its index. If the element is not found, it returns -1.
	+ Pros:
		- Can be faster for small arrays
		- Does not require creating a new array
	+ Cons:
		- May be slower for large arrays due to the search algorithm
* **Filter**: This method creates a new array with all elements from the original array except for those that don't match the specified condition.
	+ Pros:
		- Can be faster for large arrays, as it avoids searching for an element in the array
	+ Cons:
		- Creates a new array, which can be memory-intensive

**Other Considerations:**

* The `splice` method modifies the original array, whereas the `filter` method creates a new array without modifying the original.
* Both methods have their own trade-offs between performance and memory usage.

**Latest Benchmark Result**

The latest benchmark result shows that the `removeElement` function using the `filter` method is faster than the one using the `indexOf` method. This suggests that for this specific test case, creating a new array with filtered elements might be more efficient than searching for an element in the array.

**Alternatives:**

* For large arrays or performance-critical code, alternative methods like `at` (for sparse arrays) or `every()`/`some()` methods could be considered.
* Using data structures like Sets or Maps might also provide faster lookup times for certain use cases.

Related benchmarks:

Filter vs indexOf Speed small sized array 7899432423 (version: 0)

Filter vs indexOf in array remove element Javascript

Comparing performance of: remove finding element using indexof vs remove finding element using filter

Created: 2 years ago by: Guest

Jump to the latest result

remove finding element using indexof

remove finding element using filter

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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