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Flat/Filter
(version: 0)
Comparing performance of:
Spread vs Flat/Filter
Created:
3 years ago
by:
Guest
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Tests:
Spread
var params = [ "hello", true, 7 ]; var other = [ ...params, ...(null ?? []), ...params, ...(null ?? []), ...params, ...(null ?? []), ...params];
Flat/Filter
var params = [ "hello", true, 7 ]; var other = [params, null, params, null, params, null, params].flat().filter(Boolean)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Spread
Flat/Filter
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 benchmark and explain what's being tested, compared, and considered. **Benchmark Definition** The benchmark definition is represented by a JSON object with four properties: `Name`, `Description`, `Script Preparation Code`, and `Html Preparation Code`. In this case, all these properties are empty or null, indicating that no additional setup or configuration is required for the benchmark. **Individual Test Cases** There are two test cases: 1. **Spread**: This test case has a script preparation code that defines an array `params` with three elements: `"hello"`, `true`, and `7`. The test then creates another array `other` using the spread operator (`...`) to concatenate multiple copies of `params`. The resulting array is filtered using the `Boolean` function to remove any falsy values. 2. **Flat/Filter**: This test case has a script preparation code that defines an array `params` with three elements: `"hello"`, `true`, and `7`. It then creates another array `other` by concatenating multiple copies of `params` using the spread operator, followed by filtering the resulting array using the `flat()` method to remove nested arrays. The filtered array is then passed through a function that removes falsy values. **Comparison Options** The two test cases are comparing different approaches to concatenate and filter arrays: * **Spread Operator**: The first test case uses the spread operator (`...`) to concatenate multiple copies of an array, while the second test case uses it in conjunction with the `flat()` method. * **Filtering**: Both test cases filter their resulting arrays using the `Boolean` function or a similar equivalent. **Pros and Cons** * **Spread Operator**: This approach is concise and easy to read. However, it can be slower than other approaches because of its overhead. Additionally, it may not be suitable for very large datasets. * **Flat/Filter**: This approach uses `flat()` to remove nested arrays, which might not be necessary if the array structure is consistent. On the other hand, this approach can be faster than using the spread operator alone. **Library Used** There is no explicit library mentioned in the benchmark definition or test cases. However, it's likely that the JavaScript engine being tested is using its built-in `flat()` method to flatten nested arrays. **Special JS Feature/Syntax** None of the test cases explicitly use any special JavaScript features or syntax beyond what's considered standard (ES6+).
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