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StckSpt
(version: 0)
Comparing performance of:
Array Find vs Array Filter vs Array IndexOf
Created:
5 years ago
by:
Guest
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Script Preparation code:
var hasZero = []; var withoutZero = []; for (var i = 0; i < 10000; i++) { hasZero.push(Math.floor(Math.random() * 1000)); withoutZero.push(Math.floor(Math.random() * 1000) + 1) }
Tests:
Array Find
var tempResult = !!Math.round(Math.random()) ? hasZero.find(v => v === 0) : withoutZero.find(v => v === 0);
Array Filter
var tempResult = !!Math.round(Math.random()) ? hasZero.filter(v => v === 0) : withoutZero.filter(v => v === 0);
Array IndexOf
var tempResult = !!Math.round(Math.random()) ? hasZero.indexOf(0) > -1 : withoutZero.indexOf(0) > -1;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Array Find
Array Filter
Array IndexOf
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 break down the provided JSON data and explain what's being tested. **Benchmark Definition** The benchmark is defined by the `Script Preparation Code` field, which sets up two arrays: `hasZero` and `withoutZero`. These arrays contain 10,000 random integers between 0 and 1000. The purpose of these arrays is to create a testing scenario for finding or filtering elements that meet a specific condition. **Options Compared** The benchmark compares three different approaches: 1. **Array Find**: Uses the `find` method to search for an element in the array. If an element is found, the test passes; otherwise, it fails. 2. **Array Filter**: Uses the `filter` method to create a new array with only the elements that meet the condition (i.e., `v === 0`). If any elements are filtered out, the test passes; otherwise, it fails. 3. **Array IndexOf**: Uses the `indexOf` method to search for an element in the array. The test checks if the index of the desired element is greater than -1. **Pros and Cons** * **Array Find**: This approach is simple and efficient when the expected result is a single element. However, it can be slower if no elements are found. * **Array Filter**: This approach creates a new array with filtered elements, which can lead to performance issues due to memory allocation and copying. On the other hand, it's more robust than `find` since it returns an array of results, not just the first match. * **Array IndexOf**: This approach is fast but may return incorrect results if the element is not found (i.e., `-1`). **Library and Special JS Features** None of these options rely on a specific library. However, all three methods use built-in JavaScript array methods (`find`, `filter`, and `indexOf`) that are available in most modern browsers. The benchmark does not use any special JavaScript features, such as async/await or promises, which are often used to improve code readability and performance. **Alternative Approaches** Other alternatives could include: * Using a custom loop to iterate over the array elements and check for the condition. * Using `every` or `some` methods to filter or search the entire array at once. * Using a third-party library like Lodash, which provides utility functions for working with arrays. It's worth noting that the benchmark is likely designed to test the performance of these three methods in different scenarios, and the results provide insight into how each method performs under various conditions.
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