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map-push vs concat vs spread-updated
(version: 0)
Comparing performance of:
map-push vs concat vs spread
Created:
5 years ago
by:
Guest
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Script Preparation code:
var result = ['1', '2', '3', '4', '5']; var response = ['6', '7', '8'];
Tests:
map-push
response.map((num) => result.push(num));
concat
result.concat(response);
spread
[...result, ...response]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
map-push
concat
spread
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** The provided JSON represents a JavaScript microbenchmark on MeasurThat.net, which compares the performance of three different approaches for concatenating arrays: `map-push`, `concat`, and `spread`. The benchmark is designed to test the execution speed of each approach. **Approaches Compared** 1. **Map-Push**: This approach uses the `push()` method in combination with the `map()` function to concatenate two arrays. 2. **Concat**: This approach uses the `concat()` method to concatenate two arrays. 3. **Spread**: This approach uses the spread operator (`[...array, ...anotherArray]`) to concatenate two arrays. **Pros and Cons of Each Approach** 1. **Map-Push** * Pros: Can be more efficient for large arrays since it modifies the original array in place. * Cons: Can lead to performance issues if the original array is very large or if the `push()` method is slow. 2. **Concat** * Pros: Simple and easy to understand, with no side effects on the original array. * Cons: Creates a new array, which can be slower than modifying an existing array in place. 3. **Spread** * Pros: Modern and concise syntax, with no side effects on the original arrays. * Cons: Creates two new arrays (one for each `...`), which can be slower than modifying an existing array in place. **Library Used** None, as this benchmark only uses built-in JavaScript methods. **Special JS Feature or Syntax** The `map()` and `push()` functions are examples of functional programming concepts. The spread operator (`[...array, ...anotherArray]`) is a modern JavaScript feature introduced in ECMAScript 2018. **Considerations** When choosing an approach for concatenating arrays, consider the following factors: * Performance: If you're working with large arrays or need to concatenate many small arrays, `map-push` might be faster. For smaller arrays or when simplicity matters, `concat` or `spread` might be a better choice. * Code readability and maintainability: `concat` is often the most readable approach, while `map-push` can be less intuitive for some developers. **Other Alternatives** Besides the three approaches mentioned above, other ways to concatenate arrays include: * Using the `reduce()` function with an accumulator: `[...array1.reduce((acc, val) => [...acc, val], [])]` * Using a loop with concatenation: `var result = []; for (var i = 0; i < array.length; i++) { result.push(array[i]); }` * Using the `Array.prototype.join()` method with an empty string separator: `[...array].join('')` Keep in mind that these alternatives might have different performance characteristics and code readability compared to the original three approaches.
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