Benchmark: Filter vs indexOf Speesadasdasd34d

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, 99999);
remove finding element using filter
function removeElement(testArray, element) { return testArray.filter(s => s !== element); } removeElement(testArray, 99999);

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	643343.4 Ops/sec
remove finding element using filter	23709204.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the provided benchmark definition and test cases.

**Benchmark Definition**

The website, MeasureThat.net, provides a JSON representation of a JavaScript microbenchmark. The benchmark compares two approaches to remove an element from an array: `indexOf` and `filter`.

**Script Preparation Code**

The script preparation code is used to initialize the testing environment:
```javascript
var testArray = [];
for (var i = 0; i < 100000; i++) {
  testArray.push(i);
}
```
This code creates an array of 100,000 elements and assigns it to the `testArray` variable.

**Html Preparation Code**

There is no HTML preparation code provided, which means that this benchmark is focused solely on JavaScript performance.

**Test Cases**

The benchmark consists of two individual test cases:

1. **Remove finding element using indexof**

```javascript
function removeElement(testArray, element) {
  return (index = testArray.indexOf(element) !== -1) ? testArray.splice(index, 1) : 0;
}
removeElement(testArray, 99999);
```
This function uses the `indexOf` method to find the index of the specified element in the array. If the element is found, it uses the `splice` method to remove the element at that index.

2. **Remove finding element using filter**

```javascript
function removeElement(testArray, element) {
  return testArray.filter(s => s !== element);
}
removeElement(testArray, 99999);
```
This function uses the `filter` method to create a new array with all elements that are not equal to the specified element.

**Library Usage**

There is no explicit library usage in these test cases. However, it's worth noting that the `indexOf`, `splice`, and `filter` methods are part of the standard JavaScript API.

**Special JS Features/Syntax**

None mentioned in this specific benchmark.

**Pros and Cons of Different Approaches**

* **indexOf**:
	+ Pros: Fast and efficient, especially for large arrays.
	+ Cons: May be slow if the element is not found, as it requires a linear search.
* **filter**:
	+ Pros: More concise and expressive, as it creates a new array without modifying the original.
	+ Cons: May be slower than `indexOf` for very large arrays, due to the overhead of creating a new array.

**Other Considerations**

When choosing between these approaches, consider the trade-off between performance and conciseness. If you need to remove an element from an array frequently, using `indexOf` might be faster. However, if you prefer a more concise solution and are willing to accept a potential performance hit, using `filter` might be a better choice.

**Alternatives**

Other alternatives for removing elements from an array include:

* Using a custom loop or algorithm, which can provide fine-grained control over the removal process.
* Utilizing modern JavaScript features like `Array.prototype.map`, `Array.prototype.reduce`, or `Array.prototype.forEach`.
* Leveraging third-party libraries or frameworks that provide optimized array manipulation functions.

Keep in mind that the best approach depends on the specific requirements and constraints of your use case.

Related benchmarks:

Filter vs indexOf Speesadasdasd34d (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):