Benchmark: Filter vs indexOf Speed fseddfds34534

Script Preparation code:


var testArray = [];
for (var i = 0; i < 10000; 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, 9999);
remove finding element using filter
function removeElement(testArray, element) { return testArray.filter(s => s !== element); } removeElement(testArray, 9999);

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	9550334.0 Ops/sec
remove finding element using filter	23613874.0 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 benchmark and its components.

**What is tested?**

The benchmark tests two approaches to remove an element from an array in JavaScript:

1. **indexOf-based approach**: This method uses the `indexOf` function to find the index of the specified element, and then uses the `splice` method to remove the element at that index.
2. **Filter-based approach**: This method uses the `filter` method to create a new array with all elements that do not match the specified element.

**Options compared**

The two approaches are compared in terms of performance. The benchmark measures the execution speed of each approach, which is reported as the number of executions per second.

**Pros and cons of each approach:**

1. **indexOf-based approach:**
	* Pros:
		+ Can be more efficient if the element to be removed is already present at a specific index.
	* Cons:
		+ Requires finding the index of the element, which can be slow for large arrays or elements that are not present in the array.
2. **Filter-based approach:**
	* Pros:
		+ Does not require finding an index, making it more efficient for large arrays or elements that are not present in the array.
	* Cons:
		+ Creates a new array with all elements that do not match the specified element, which can be memory-intensive.

**Library and syntax considerations**

In this benchmark, no libraries are explicitly mentioned. However, JavaScript's built-in `Array` methods (`indexOf`, `splice`, and `filter`) are used. These methods are part of the ECMAScript standard and are supported by most modern browsers and Node.js environments.

**Special JS features or syntax**

None of the provided code uses any special JavaScript features or syntax beyond what is considered standard. However, it's worth noting that some JavaScript engines may have optimizations or implementations for these methods that could affect performance.

**Alternatives**

Other approaches to remove an element from an array in JavaScript include:

1. **Manual indexing**: Using a manual index variable to keep track of the current position and incrementing it each time an element is removed.
2. **Using `map` and `reduce`**: Creating a new array with all elements that do not match the specified element using `map`, and then reducing the resulting array to a single value.

These alternatives may have different performance characteristics depending on the specific use case and array size.

In summary, the benchmark tests two common approaches to remove an element from an array in JavaScript: indexOf-based and filter-based. Each approach has its pros and cons, and the choice of which one to use depends on the specific requirements of the application.

Related benchmarks:

Filter vs indexOf Speed fseddfds34534 (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):