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Pusshhhhh
(version: 0)
Comparing performance of:
For vs Spread
Created:
3 years ago
by:
Guest
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Script Preparation code:
var ys = [4, 5, 6]; var xs = [1, '2', '3'];
Tests:
For
for (let i = 0; i < xs.length; i++) { ys.push(xs[i]); } return ys;
Spread
return ys.push(...xs);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
For
Spread
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
gemma2:9b
, generated one year ago):
This benchmark tests two different approaches to adding elements from one array (`xs`) into another array (`ys`). **Option 1: `for` loop:** This classic method iterates through each element in `xs` and uses the `push()` method to add it to `ys`. ```javascript for (let i = 0; i < xs.length; i++) { ys.push(xs[i]); } return ys; ``` **Option 2: Spread operator (`...`)**: This more concise approach uses the spread operator to directly expand the elements of `xs` and add them to `ys` using a single `push()` call. ```javascript return ys.push(...xs); ``` **Pros and Cons:** * **`for` loop:** More verbose, but potentially more familiar to developers accustomed to traditional iteration methods. Some people may find it easier to reason about the step-by-step process. It might offer slightly better performance in some cases due to potential compiler optimizations. * **Spread operator (`...`)**: Significantly shorter and more readable, making the code cleaner and more concise. This can be especially beneficial for larger arrays or complex operations. **Other Considerations:** * The benchmark primarily focuses on execution speed. In real-world scenarios, other factors like code maintainability, readability, and potential memory usage should also be taken into account. **Alternatives:** While the benchmark showcases two specific methods, there are alternative approaches to achieve the same result, such as: * **`concat()` method:** This method creates a new array containing all the elements of `xs` appended to `ys`. While it doesn't modify `ys` in place, it can be efficient for certain use cases. * **Functional programming techniques:** Libraries like Ramda or Lodash provide functional functions for array manipulation, offering potentially more elegant and performant solutions. Let me know if you have any further questions about the benchmark or JavaScript array manipulation!
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