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Test adding into array
(version: 0)
Comparing performance of:
Push vs Spread
Created:
2 years ago
by:
Guest
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Tests:
Push
let array = []; for (let i = 0; i < 10000; i++) { array.push(i); } return array;
Spread
let array = []; for (let i = 0; i < 1000; i++) { array = [...array, i]; } return array;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Push
Spread
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in this benchmark. **Overview** The test case measures the performance of adding elements to an array using two different approaches: `push` and `spread`. The goal is to determine which approach is faster. **Approaches Compared** There are two main approaches compared: 1. **Push**: This approach uses the `push` method to add elements to the end of the array. For example, in the benchmark definition, the code `array.push(i)` is executed 10,000 times. 2. **Spread**: This approach uses the spread operator (`...`) to create a new array with additional elements added to it. In this case, the code `array = [...array, i]` is executed 1,000 times. **Pros and Cons of Each Approach** * **Push:** * Pros: * More straightforward and readable syntax. * Less memory overhead since only the last element needs to be updated. * Cons: * May involve more cache misses due to sequential accesses to the end of the array. * **Spread:** * Pros: * Can be faster for large arrays, as it avoids cache misses and is optimized by JavaScript engines. * More concise syntax can lead to fewer typos or errors. * Cons: * Less intuitive syntax for some developers. * May require more memory since an additional array needs to be created. **Library Usage** There is no explicit library usage in the provided benchmark definitions. However, it's worth noting that `Array.prototype.push()` and the spread operator (`...`) are built-in methods in JavaScript. **Special JS Features or Syntax** In this case, there are no special features or syntaxes being tested or utilized beyond what's standard for JavaScript arrays. **Other Considerations** * Cache performance is crucial when comparing these approaches. Modern JavaScript engines have optimized the spread operator to minimize cache misses, which can result in significant performance gains. * The choice of language and its version (in this case, JavaScript) might affect performance. Different languages or versions might optimize `push` or spread differently. **Alternatives** Some alternative approaches could be tested: 1. **Using `unshift()`**: Instead of using `push()`, you can also test `unshift()` to add elements to the beginning of the array. 2. **Array.concat()**: Another approach is to use `array.concat()` instead of `spread()`. This method creates a new array by concatenating the existing array with the new element or elements. Keep in mind that these alternatives might change the overall performance results and should be tested accordingly.
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