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testsemeke
(version: 0)
Comparing performance of:
a vs b
Created:
8 years ago
by:
Guest
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Tests:
a
let arr = Array(30).fill(Array(30).fill(0))
b
let arr = [...Array(30)].map(x=>Array(30).fill(0));
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Result
a
b
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks! **What is being tested?** The provided JSON represents two individual test cases for a benchmarking tool called MeasureThat.net. The test cases are designed to measure the performance of creating an array filled with zeros in two different ways: 1. **Method A:** `let arr = Array(30).fill(Array(30).fill(0))` 2. **Method B:** `let arr = [...Array(30)].map(x=>Array(30).fill(0))` These test cases aim to evaluate the performance of creating a large array filled with zeros using two different approaches. **Options being compared:** The benchmark is comparing the performance of Method A and Method B. Here are some pros and cons of each approach: * **Method A:** `let arr = Array(30).fill(Array(30).fill(0))` + Pros: - This method creates an array of 30 elements, where each element is another array filled with zeros. - It's a straightforward and simple way to create a large array. + Cons: - The inner array creation can lead to slow performance due to the repeated allocation of memory. * **Method B:** `let arr = [...Array(30)].map(x=>Array(30).fill(0))` + Pros: - This method uses the spread operator (`...`) and the `map()` function, which are more efficient than creating arrays with `Array.fill()`. - It avoids the repeated allocation of memory for each inner array. + Cons: - The use of `map()` can introduce additional overhead due to the creation of intermediate results. **Library:** In this benchmark, there is no explicit library mentioned. However, it's likely that the benchmarks are being run in a modern JavaScript environment, which may include built-in libraries and functions optimized for performance. **Special JS features or syntax:** The benchmark uses the spread operator (`...`) and the `map()` function, which are modern JavaScript features introduced in ECMAScript 2015. These features are widely supported by most modern browsers and Node.js environments. However, it's worth noting that older browsers or environments may not support these features, so the results of this benchmark might not be representative of older systems. **Other alternatives:** There are other ways to create a large array filled with zeros in JavaScript. Some alternative approaches include: * Using `Array.prototype.fill()` and creating an array of 30 elements using `Array(30)`. * Using a loop to create the inner arrays. * Using a library like `lodash` or `ramda`, which provide optimized functions for array manipulation. It's worth noting that these alternatives may have different performance characteristics than the two methods being compared in this benchmark.
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