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Push vs Spread in javascript2
(version: 0)
Push vs Spread in javascript2
Comparing performance of:
push vs spread
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
let a = [1, 1, 1, 1]; let i = 0;
Tests:
push
let a = [1, 1, 1, 1]; let i = 0; while(i < 10000) { a.push(1); i++; }
spread
let a = [1, 1, 1, 1]; let i = 0; while(i < 10000) { a = [...a, 1]; i++; }
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 test cases and explain what's being tested, the options compared, their pros and cons, and other considerations. **Benchmark Definition** The benchmark definition is provided in JSON format, which defines two test cases: "Push" and "Spread". The script preparation code for each test case is as follows: 1. **Push**: `let a = [1, 1, 1, 1];\r\nlet i = 0;` 2. **Spread**: `let a = [1, 1, 1, 1];\r\nlet i = 0;` The difference between the two test cases lies in how the array `[1, 1, 1, 1]` is modified: * In the "Push" test case, the element `a.push(1)` is used to add an element to the end of the array. * In the "Spread" test case, the spread operator `a = [...a, 1]` is used to create a new array with the existing elements and adds the element `1` at the end. **Options Compared** The two options being compared are: 1. **Push**: uses the `push()` method to add an element to the end of the array. 2. **Spread**: uses the spread operator (`...`) to create a new array with the existing elements and adds an element at the end. **Pros and Cons** * **Push**: + Pros: widely supported, efficient for large arrays, doesn't require additional memory allocation (except for the added element). + Cons: can lead to slower performance due to the need to traverse the entire array to find the correct index. * **Spread**: + Pros: creates a new array with the existing elements and adds an element at the end, which can improve performance by avoiding modifications to the original array. Also, it's more concise and easier to read. + Cons: requires additional memory allocation for the created array, and its performance can be slower due to the creation of a new array. **Other Considerations** * **Library**: Neither "Push" nor "Spread" uses any external libraries. The test cases only rely on built-in JavaScript functionality. * **Special JS Feature/ Syntax**: There are no special JavaScript features or syntax used in these test cases. They only use basic array operations and the spread operator. **Alternatives** Other alternatives to compare could be: * Using `unshift()` instead of `push()` * Using `concat()` instead of the spread operator * Comparing performance with different data types (e.g., numbers, strings, objects) * Using a different language or implementation (e.g., Python, Java) Keep in mind that these alternatives would require modifications to the benchmark definition and script preparation code.
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