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Add 100 new elements to array: push vs destructuring
(version: 0)
Comparing performance of:
Spread operator vs Push
Created:
3 years ago
by:
Guest
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Tests:
Spread operator
var params = [ "hello", true, 7 ] var other = [...params] for (let i = 0; i < 100; i++) { other = [ ...other, 'new' ] }
Push
var params = [ "hello", true, 7 ]; for (let i = 0; i < 100; i++) { params.push('new'); }
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Spread operator
Push
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain the benchmarking test. **Benchmark Test Overview** The provided JSON represents two test cases for measuring JavaScript performance: 1. **Push vs Spread Operator**: This test compares the performance of two approaches: * Using the spread operator (`...`) to create a new array and append elements. * Using the `push()` method to add elements to an existing array. 2. The test aims to measure which approach is faster when adding 100 new elements to an array. **Options Compared** The two options being compared are: 1. **Push**: This involves using the `push()` method to append elements to an existing array. The push() method modifies the original array and returns `undefined`. 2. **Spread Operator**: This involves using the spread operator (`...`) to create a new array and then appending elements to it. **Pros and Cons of Each Approach** 1. **Push**: * Pros: Fast, efficient, and widely supported. * Cons: Modifies the original array, which can be unexpected behavior if not handled properly. 2. **Spread Operator**: * Pros: Creates a new array, preserving the original data's integrity. Also, it can lead to more readable code in some cases. * Cons: May incur additional overhead due to creating a new array. **Other Considerations** 1. **Library Usage**: Neither test case uses any external libraries. 2. **Special JS Features**: No special JavaScript features or syntax is used in these tests. **Alternatives** Other alternatives for adding elements to an array could be: * Using `unshift()` instead of `push()`. * Creating a new array using the `Array.prototype.map()` method and then appending the new elements. * Using a loop with `splice()` method to add elements at the end of the array. However, in this specific test case, only two approaches are being compared: Push vs Spread Operator. The provided benchmark results show that the push() approach is significantly faster (by approximately 30 times) than the spread operator approach. This highlights the importance of considering performance when choosing a method for adding elements to an array.
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