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testsagar
(version: 0)
Comparing performance of:
test1 vs test2
Created:
3 years ago
by:
Guest
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Tests:
test1
const a = [2, 1, 4, 3]; console.log(a); let b = Array.from(a).sort(); console.log(b); console.log(a)
test2
const a = [2, 1, 4, 3]; console.log(a); let b = [...a].sort(); console.log(b); console.log(a)
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
test1
test2
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 what's being tested on the provided JSON. **Benchmark Definition** The benchmark definition is a JavaScript code snippet that performs two operations: 1. Creates an array `a` with four elements and logs it to the console using `console.log(a)`. 2. Converts the array `a` to a sorted array using either `Array.from(a).sort()` or spread syntax `[...a].sort()`, sorts it, and then logs it to the console. **Options Compared** The benchmark is comparing two approaches: 1. **Array.from(a).sort()**: This method uses an intermediate array (`from`) to create a new copy of the original array before sorting it. It returns an iterator object that yields the sorted elements. 2. **[...a].sort()**: This spread syntax creates a new array by spreading the elements of `a` into a new array, sorts it, and then logs it. **Pros and Cons** **Array.from(a).sort():** Pros: * It's more explicit about creating an intermediate copy of the array, which can help with debugging. * It's generally considered a better practice to use this method when you need a new array for some reason (e.g., when working with APIs that require arrays as input). Cons: * It creates an extra object and uses more memory than the spread syntax approach. **[...a].sort():** Pros: * It's more concise and efficient, using only one operation to create and sort the array. * It's faster because it avoids creating an intermediate copy of the array. Cons: * Some developers might find it less readable due to its brevity and use of spread syntax. * It's not as explicit about the intent of sorting the original array. **Library** There is no library mentioned in the provided JSON. However, `Array.from()` is a built-in JavaScript method introduced in ECMAScript 2015 (ES6). **Special JS Feature/Syntax** The benchmark uses the spread syntax `[...a]`, which is a new feature introduced in ECMAScript 2018 (ES2018). It's called "spread operator" or "rest spread operator." The `...` characters are used to create a new array from an existing iterable.
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