Benchmark: filter + pop VS reverse + find feq gegr

Tests:

revere + find
const arr = [{name: 'jean',index: 1},{name: 'mark',index: 2},{name: 'jean',index: 3}, {name: 'mark',index: 4}] for(let i = 0; i < 10; i++){ const item = arr.reverse().find(item => item.name === 'jean') }
filter + pop
const arr = [{name: 'jean',index: 1},{name: 'mark',index: 2},{name: 'jean',index: 3}, {name: 'mark',index: 4}] for(let i = 0; i < 10; i++){ const item = arr.filter(item => item.name === 'jean').pop() }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
revere + find
filter + pop

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0

Browser/OS: Firefox 123 on Linux

View result in a separate tab

Test name	Executions per second
revere + find	6448923.0 Ops/sec
filter + pop	3483186.8 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 benchmark and its options.

**Benchmark Overview**

The benchmark measures the performance of two different approaches to find an item in an array: `filter + pop` and `reverse + find`.

**Options Compared**

1. **Filter + Pop**: This approach uses the `Array.prototype.filter()` method to create a new array with only the elements that match the condition (in this case, finding all items with `name === 'jean'`). The resulting array is then traversed from end to beginning using the `Array.prototype.pop()` method to retrieve the last item.
2. **Reverse + Find**: This approach uses the `Array.prototype.reverse()` method to reverse the order of the elements in the original array, and then uses the `Array.prototype.find()` method to find the first element that matches the condition (in this case, finding the first item with `name === 'jean'`).

**Pros and Cons**

1. **Filter + Pop**:
	* Pros:
		+ Creates a new array with only the desired elements, which can be beneficial for smaller datasets.
		+ Can be more memory-efficient than reversing the entire array.
	* Cons:
		+ Requires two iterations over the original array (filtering and then popping), which can be slower for larger arrays.
2. **Reverse + Find**:
	* Pros:
		+ Only requires one iteration over the original array (reversing and finding).
		+ Can be faster for larger arrays since it only traverses the array once.
	* Cons:
		+ Reverses the entire array, which can be memory-intensive for very large datasets.

**Other Considerations**

1. **Memory Allocation**: The `filter + pop` approach is generally more memory-efficient because it creates a new array with only the desired elements, whereas the `reverse + find` approach reverses the entire original array.
2. **Array Traversal**: Both approaches traverse the array from end to beginning, but the `filter + pop` approach requires two iterations over the original array, while the `reverse + find` approach only requires one iteration.

**Library Used**

None mentioned in the provided benchmark definition and test cases. However, it's worth noting that the `Array.prototype.filter()` and `Array.prototype.find()` methods are part of the JavaScript standard library.

**Special JS Features or Syntax**

There are no special JS features or syntax used in these benchmarks beyond basic JavaScript language features like loops, array methods, and conditional statements.

Related benchmarks:

filter + pop VS reverse + find feq gegr (version: 0)

Comparing performance of: revere + find vs filter + pop

Created: 2 years ago by: Guest

Jump to the latest result

revere + find

filter + pop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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