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flatMap vs Reduce with push - test2
(version: 0)
Comparing performance of:
reduce vs flatmap
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var arr = Array(10_000).fill(0)
Tests:
reduce
arr.reduce((acc, x) => { const c = [x, x]; acc.push(...c); return acc;}, [])
flatmap
arr.flatMap(x => [x, x])
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
reduce
flatmap
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
gemma2:9b
, generated one year ago):
This benchmark compares two JavaScript approaches for transforming an array: `reduce` and `flatMap`. **Let's break down each approach:** * **`reduce`**: This method iterates through the array, accumulating a result based on the current element and the accumulated value. In this case, it creates a new array (`acc`) by pushing duplicates of each element from the original array into `acc`. * **Pros:** More flexible, can be used for various transformations beyond simple duplication. Can be more readable for complex operations. * **Cons:** More verbose in simpler cases like this one. * **`flatMap`**: This method iterates through the array and applies a function to each element. It then flattens the resulting array of arrays into a single array. In this case, it directly creates a new array with duplicates of each element from the original array. * **Pros:** More concise and easier to read for simple transformations like this one. **Other Considerations:** * **Performance:** The benchmark results show that `reduce` is significantly faster than `flatMap` in this specific case. This could be due to various factors like how JavaScript's engine optimizes each method or the inherent nature of the transformation. * **Readability:** While `flatMap` is more concise, `reduce` might be more readable for complex transformations where you need to accumulate a result over multiple steps. **Alternatives:** 1. **Manually iterating with a loop:** You could use a `for` loop to iterate through the array and manually create the new array with duplicates. This would give you maximum control but could be less efficient than using built-in methods. 2. **Libraries:** Libraries like Lodash offer functions similar to `reduce` and `flatMap` that might have optimizations or specific use cases. **Remember:** The best approach depends on the specific task and the context of your code. Benchmarking different options is crucial for finding the most efficient and readable solution in your particular situation.
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flatMap vs Reduce with push - test
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