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push vs spread for single element addition to array
(version: 0)
Comparing performance of:
push vs spread
Created:
6 years ago
by:
Guest
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Script Preparation code:
var arr = [{id: 0, name: 'zero', completed: true}, {id: 1, name: 'one', completed: true}, {id: 2, name: 'two', completed: true}]; var temp = {id: 3, name: 'three', completed: false};
Tests:
push
arr.push(temp);
spread
arr = [...arr, temp];
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
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the benchmark definition and test cases for you. **Benchmark Definition:** The provided JSON represents a benchmark that tests two different approaches to add a single element to an array: 1. `arr.push(temp);` 2. `arr = [...arr, temp];` These approaches are compared in terms of their performance. **Options Compared:** Two options are being compared: * **Push vs Spread**: The first option uses the `push()` method to add a new element to the end of an array, while the second option uses the spread operator (`...`) to create a new array with the original elements followed by the new element. **Pros and Cons:** **Push Method (arr.push(temp));** Pros: * Simple and intuitive syntax * Fast and efficient for small arrays * Works well with many libraries and frameworks that use the `push()` method Cons: * Can be slower than the spread operator for large arrays due to the need to traverse the array elements * May not be as memory-efficient, as it creates a new element object on the heap **Spread Operator (arr = [...arr, temp]);** Pros: * Faster and more efficient than the push method for large arrays * Creates a new array with the original elements followed by the new element, which can be more memory-efficient * Works well with modern JavaScript engines that optimize the spread operator Cons: * More complex syntax compared to the push method * May require more memory allocation due to the creation of a new array object **Library:** There is no library mentioned in this benchmark. However, it's worth noting that both approaches use native JavaScript methods, which are not typically considered "libraries" in the classical sense. **Special JS Feature or Syntax:** None of these test cases rely on any special JavaScript features or syntax beyond what's available in modern browsers. They are straightforward examples of common array operations. **Other Alternatives:** If you wanted to benchmark different approaches to adding an element to an array, some alternative options could include: * Using `arr.concat(temp)` instead of the spread operator * Using `Array.prototype.splice()` to add a new element at a specific index * Using a library like Lodash's `_.insert()` method Keep in mind that these alternatives may introduce additional complexity or dependencies, so it's essential to consider the trade-offs before adding them to your benchmark.
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