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for-push vs filter
(version: 0)
Comparing performance of: flatMap vs for-push
Comparing performance of:
for-push vs flatMap
Created:
3 years ago
by:
Guest
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Script Preparation code:
var arr = Array.from({length: 10_000}, () => Math.floor(Math.random() * 2));
Tests:
for-push
var result = []; for (var i = 0; i < arr.length; i++) { var item = arr[i]; if (item !== 0) { result.push(item); } }
flatMap
arr.flatMap((x) => (x !== 0 ? [x] : []));
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
for-push
flatMap
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what is being tested. **Benchmark Definition** The benchmark compares the performance of two approaches: `flatMap` vs `for-push`. In this case, we're specifically comparing the performance of flat mapping an array using `Array.prototype.flatMap()` (in modern JavaScript) versus pushing elements to a new array using a traditional `for` loop (`for-push`). **Options Compared** The two options being compared are: 1. **flatMap**: A method that creates a new array with the results of applying a provided function on every element in this array. It short-circuits and returns as soon as the first source array is exhausted. 2. **For-Push (for-push)**: A traditional approach where you create an empty array and then iterate over the original array, pushing each non-zero element to the new array. **Pros and Cons** **flatMap**: Pros: * More concise and expressive code * Optimized for performance in modern browsers Cons: * May not work well with older browsers or environments that don't support `Array.prototype.flatMap()` * Can be less readable for developers unfamiliar with modern JavaScript features **For-Push (for-push)**: Pros: * Wide browser compatibility (works on older browsers and environments) * More readable code for developers familiar with traditional iteration patterns * No reliance on a specific JavaScript feature or library Cons: * Less concise and potentially more verbose code * May be slower due to the overhead of pushing elements to an array **Library: Array.prototype.flatMap()** The `Array.prototype.flatMap()` method is a part of the modern JavaScript standard and is supported by most modern browsers. It's designed to provide a concise and efficient way to flat map arrays, making it a popular choice for many developers. **Special JS Feature/Syntax: None in this case** There are no special JavaScript features or syntax used in this benchmark that require specific knowledge of modern JavaScript or its quirks. **Other Alternatives** For older browsers or environments that don't support `Array.prototype.flatMap()`, you could use other methods like: * `Array.prototype.map()` and then spreading the result into a new array using the spread operator (`...`) * Using a library like Lodash (which provides an implementation of `flatMap`) Keep in mind that these alternatives may introduce additional overhead or changes to the code, potentially affecting performance.
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