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from vs stat
(version: 0)
Testing the difference between creating filled arrays.
Comparing performance of:
stat vs Array.from()
Created:
2 years ago
by:
Guest
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Tests:
stat
const test2 = [0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1];
Array.from()
const test1 = Array.from(Array(11).keys(), (i) => i / 10);
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Suite status:
<idle, ready to run>
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Test case name
Result
stat
Array.from()
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 test cases that compare the performance of creating filled arrays using different methods: `stat` and `Array.from()`. The tests create an array with 11 elements, where each element is a fraction (e.g., 0.1, 0.2, etc.). The goal is to measure which approach is faster. **Options compared** There are two options being compared: 1. **Stat**: This method creates an array by iterating over the range of numbers and pushing them into an array. It's a simple, straightforward way to create an array with a specific number of elements. 2. **Array.from()**: This method creates a new array from an iterable (in this case, a generator function). The `(i) => i / 10` part is a generator function that generates the fractions. **Pros and Cons** * **Stat**: + Pros: Simple, easy to understand, and might be faster for small arrays. + Cons: Can be slower for large arrays due to the iteration overhead. * **Array.from()**: + Pros: Faster for large arrays due to its ability to create an array without iterating over a sequence. It's also more concise and readable. + Cons: Requires creating a generator function, which can add complexity. **Library and syntax** There is no explicit library mentioned in the benchmark definition or test cases. However, `Array.from()` uses the `Array` class, which is part of the JavaScript Standard Library. The `(i) => i / 10` part in the `Array.from()` test case uses an arrow function, which is a concise way to create small functions in JavaScript. It's a modern feature introduced in ECMAScript 2015 (ES6). **Other considerations** * **Variance**: The benchmark results may vary depending on the specific browser, OS, and hardware being used. * **Cache performance**: Modern browsers often use caching to improve performance. This might affect the results of microbenchmarks like this one. **Alternatives** If you're looking for alternatives to `stat` or `Array.from()`, you could consider: 1. **Native array methods**: JavaScript arrays have many built-in methods, such as `fill()` or `map()`, which can be used to create filled arrays. 2. **Other libraries or frameworks**: Depending on the specific use case, other libraries or frameworks might offer more efficient ways to create arrays (e.g., React's `Array.from()` alternative). 3. **Native array construction**: In some cases, you can construct an array using native JavaScript methods like `new Int32Array()` or `new Float64Array()`, which can be faster than the array creation methods mentioned above. Keep in mind that the best approach often depends on the specific requirements of your project and the trade-offs between performance, code readability, and maintainability.
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