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reduce vs flatMap test
(version: 0)
Comparing performance of:
reduce vs flatMap
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var arr = new Array(10000).fill([1,2]);
Tests:
reduce
arr.reduce((res,x) => { x.forEach(item => {res.push(item)}) return res; },[]);
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
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into explaining the provided benchmark. **Benchmark Definition** The website provides a JSON representation of a JavaScript microbenchmark, where users can create and run test cases. In this case, we have two individual test cases: 1. `reduce` 2. `flatMap` **What is tested?** Both tests are designed to measure the performance of these two different approaches for mapping over an array. * `reduce`: This function applies a callback function to each element in the array and reduces it to a single output value. * `flatMap`: This method returns a new array with the results of applying a provided function on every element of the calling array. **Options compared** The two tests compare the performance of using `reduce` versus `flatMap`. Both approaches have their own set of advantages and disadvantages. **Pros of each approach:** * **Reduce** * Pros: * More control over iteration * More flexibility in callback function implementation * Cons: * Can be less efficient due to repeated concatenation operations (pushing elements to an array) * **flatMap** * Pros: * Can be more efficient than `reduce` for larger arrays, as it uses a single loop operation instead of repeated concatenations. * Cons: * Less control over iteration * May require additional memory allocation due to creating a new array. **Other considerations** * Memory usage: Both methods have different implications on memory usage. `reduce` tends to consume more memory because it uses the accumulator array, whereas `flatMap` does not allocate new memory for its return value. * Code readability and maintainability: The choice between these two often depends on whether you prefer a simpler, more straightforward implementation or one with more control over iteration. **Library usage** Neither of the two methods relies on external libraries. However, both functions are built-in JavaScript methods. **Special JS feature/syntax** None mentioned in this specific benchmark.
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