Benchmark: Filter vs indexOf Speed fseddfds34534fdsfsd32423

Script Preparation code:


var testArray = [];
for (var i = 0; i < 1000000; 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, 999999);
remove finding element using filter
function removeElement(testArray, element) { return testArray.filter(s => s !== element); } removeElement(testArray, 999999);

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	1725.7 Ops/sec
remove finding element using filter	89.9 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 benchmark definition and test cases.

**Benchmark Definition**

The benchmark is designed to compare the performance of two approaches: `indexOf` and `filter` methods for removing an element from an array in JavaScript.

**Options Compared**

Two options are compared:

1. **Remove Element using IndexOf**: This approach uses the `indexOf` method to find the index of the specified element, and then removes it from the array using `splice`.
2. **Remove Element using Filter**: This approach uses the `filter` method to create a new array that excludes the specified element.

**Pros and Cons**

* **IndexOf Approach**
	+ Pros:
		- More efficient when the element is found at the beginning of the array.
		- Can be used with arrays that are already sorted or have some ordering.
	+ Cons:
		- May require more iterations to find the index if the element is not in the array.
		- Can be slower for large arrays due to the overhead of `splice`.
* **Filter Approach**
	+ Pros:
		- More concise and easier to read, as it does not require explicit iteration or indexing.
		- Can handle large arrays efficiently by creating a new array without modifying the original one.
	+ Cons:
		- May be slower for small arrays due to the overhead of creating a new array.

**Library Used**

In this benchmark, no external libraries are used. The `filter` method is a built-in JavaScript function that creates a new array with elements that pass a test provided by a user-supplied function (in this case, `s => s !== element`).

**Special JS Feature/Syntax**

The benchmark does not explicitly use any special JavaScript features or syntax. However, it assumes the presence of ES6+ syntax and built-in methods like `filter`, `indexOf`, and `splice`.

**Other Alternatives**

For removing an element from an array, other alternatives could include:

* Using a `for` loop to iterate over the array and manually check for the element.
* Using `map` or `reduce` methods instead of `filter`.
* Using a library like Lodash, which provides additional utility functions for array manipulation.

In terms of overall optimization strategies, these alternatives might not be suitable for this specific use case (removing an element from an array), but they could be used in other scenarios where the data structure or desired outcome differ.

Related benchmarks:

Filter vs indexOf Speed fseddfds34534fdsfsd32423 (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):