Benchmark: Filter vs indexOf Speesadasdasddsadas34dd32qee

Script Preparation code:


var testArray = [];
for (var i = 0; i < 100000; i++) {
  testArray.push(i)
}

Tests:

remove finding element using indexof
function removeElement(testArray, element) { return ( index = testArray.indexOf(element) !==-1) ? testArray.splice(index, 1):0; } removeElement(testArray, 50000);
remove finding element using filter
function removeElement(testArray, element) { return testArray.filter(s => s !== element); } removeElement(testArray, 50000);

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

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**What's being tested:**

The benchmark compares two approaches to remove an element from an array:

1. **indexOf**: This method returns the index of the first occurrence of the specified element, or -1 if it's not found. The approach uses `splice()` to remove the element at that index.
2. **Filter**: This method creates a new array with all elements that pass the test implemented by the provided function.

**Options compared:**

The two options being compared are:

* Using `indexOf` with `splice()`
* Using `filter`

**Pros and Cons of each approach:**

1. **IndexOf with Splice:**
	* Pros:
		+ Generally faster, since it only requires a single pass through the array.
		+ Can be more efficient for large arrays, as it avoids creating a new array.
	* Cons:
		+ Returns the index of the first occurrence, which might not be what you want (e.g., if there are multiple occurrences).
		+ Modifies the original array.
2. **Filter:**
	* Pros:
		+ More concise and easier to read.
		+ Does not modify the original array (returns a new one).
	* Cons:
		+ May be slower, since it requires creating a new array with all elements that pass the test.

**Other considerations:**

* Both approaches have a time complexity of O(n), where n is the length of the array. However, the `indexOf` approach might have a slight performance advantage due to its single-pass nature.
* The `filter()` method creates a new array, which can be more memory-efficient than modifying the original array with `splice()`.
* If you only need to remove one occurrence of an element, `indexOf` with `splice()` might be a better choice. However, if you need to remove multiple occurrences or don't care about the index, `filter` is likely a better option.

**Library and special JS features:**

There are no libraries used in this benchmark, and there are no special JavaScript features mentioned (e.g., async/await, Promises).

**Alternatives:**

If you want to explore other approaches, consider:

* Using `map()` or `reduce()` instead of `filter()`, which can be more expressive but might have a slightly higher performance overhead.
* Using a custom implementation with a loop and an index variable, which would eliminate the need for `indexOf` and `splice`.
* Using a library like Lodash or Ramda, which provide optimized implementations of these operations.

Keep in mind that the best approach will depend on your specific use case and performance requirements.

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 122 on Android

View result in a separate tab

Test name	Executions per second
remove finding element using indexof	9250.2 Ops/sec
remove finding element using filter	486.9 Ops/sec

Related benchmarks:

Filter vs indexOf Speesadasdasddsadas34dd32qee (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: 8 months ago by: Guest

Jump to the latest result

remove finding element using indexof

remove finding element using filter

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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