Benchmark: Testing if filter is faster than splice

Tests:

splice
const loyaltyPrograms = [{ id: 1 }, { id: 2 }, { id: 3 }, { id: 4 }, { id: 5 }]; let id = 3; const loyaltyProgramIndex = loyaltyPrograms.findIndex((item) => item.id === id); if (loyaltyProgramIndex === -1) { return; } // replace existing object with new one loyaltyPrograms.splice(loyaltyProgramIndex, 1);
filter
let loyaltyPrograms = [{ id: 1 }, { id: 2 }, { id: 3 }, { id: 4 }, { id: 5 }]; let id = 3; loyaltyPrograms = loyaltyPrograms.filter((item) => item.id !== id);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
splice
filter

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
splice	26230582.0 Ops/sec
filter	40420416.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

**What is being tested?**

The provided JSON represents two test cases that compare the performance of two different approaches to remove an element from an array:

1. `filter`: using the `filter()` method to create a new array with elements that do not match a given condition.
2. `splice`: using the `splice()` method to remove an element at a specified index.

**Options compared**

The test case compares the performance of these two approaches when removing an element from an array based on its `id`. The test aims to determine which approach is faster for this specific use case.

**Pros and Cons**

* `filter()`: Pros:
	+ More concise and readable code.
	+ Does not modify the original array.
	+ Can be more efficient if the array is very large, as it only iterates over elements that need to be kept.
* `splice()`: Pros:
	+ Can be more efficient if the element being removed has a specific index, as it avoids creating a new array.
	+ Does not create unnecessary memory allocations.
* Cons:
	+ More verbose and complex code.
	+ Modifies the original array.

**Library usage**

Neither of the test cases uses any libraries. Both methods are built-in to JavaScript.

**Special JS features or syntax**

There are no special JavaScript features or syntax used in these test cases. They only utilize basic JavaScript concepts, such as arrays, loops, and conditionals.

**Alternative approaches**

Other alternatives for removing an element from an array could be:

* Using `map()` with a callback function that returns `undefined` for the desired element.
* Using a custom loop to iterate over the array and remove elements.
* Using a library like Lodash, which provides a `removeAt()` method.

However, it's worth noting that these alternative approaches might not be as efficient or concise as using `filter()` or `splice()`, depending on the specific use case.

Related benchmarks:

Testing if filter is faster than splice (version: 0)

Comparing performance of: splice vs filter

Created: one year ago by: Guest

Jump to the latest result

splice

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):