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filter + pop VS reverse + find feq gegr
(version: 0)
Benchmark.js
Comparing performance of:
revere + find vs filter + pop
Created:
2 years ago
by:
Guest
Go to the latest result
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>
Run tests (2)
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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
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<iframe src="https://measurethat.net/Embed?id=512667" width="100%" height="500px"></iframe>
revere + find
6.4M/s
filter + pop
3.5M/s
View exact numbers
Test name
Executions per second
✓
revere + find
6,448,923 Ops/sec
filter + pop
3,483,187 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
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.
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