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test forEach and push vs map unshift 2
(version: 0)
test forEach and push vs map unshift
Comparing performance of:
for and push vs map and unshift
Created:
2 years ago
by:
Guest
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Tests:
for and push
const arr = [1,2,3,4,5,6,7,8,9,10] const res = []; arr.forEach((el)=> res.push(el+1));
map and unshift
const arr = [1,2,3,4,5,6,7,8,9,10] let res = []; res = arr.map((el)=> el+1); res.unshift(0);
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Suite status:
<idle, ready to run>
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Test case name
Result
for and push
map and unshift
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N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in the provided JSON benchmark. The main goal of this benchmark is to compare the performance of two approaches for manipulating arrays: 1. `forEach` with `push` 2. `map` followed by `unshift` **Options Compared** In the first approach, `forEach`, an array element is pushed onto another array (`res`) using the `push` method. In the second approach, `map`, a new array is created containing modified elements of the original array (`arr`) and then the resulting array has its first element prepended with `0` using `unshift`. **Pros and Cons** ### For Each with Push * **Pros:** + Simple to understand and implement. + No extra memory allocation required for the resulting array. * **Cons:** + Can be slower due to the use of `push`, which involves shifting elements in the destination array. ### Map followed by Unshift * **Pros:** + Creates a new array, which can lead to better performance and less memory pressure. + Allows for direct modification of the resulting array without needing to iterate over it again. * **Cons:** + Requires extra memory allocation for the newly created array. + Can be slower due to the use of `map` followed by `unshift`. **Other Considerations** In addition to performance, we should also consider: * Memory usage: The first approach might consume more memory than the second one, especially when dealing with large arrays. * Readability and maintainability: While the first approach is simple, the second one might be considered more readable due to its use of a single `map` operation followed by a clear `unshift`. **Library Usage** Neither of the approaches relies on any external libraries. However, if we were to consider using libraries for optimization or simplification, some options could include: * Lodash: Provides functions like `flattenArray` and `merge`, which might simplify array manipulation. * Ramda: Offers functional programming utilities, including those for array operations. **Special JS Features/Syntax** This benchmark does not use any special JavaScript features or syntax beyond the standard ES6+ syntax.
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