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Javascript: Spread vs push
(version: 0)
Adding to an array using spread vs push
Comparing performance of:
Push vs Spread
Created:
3 years ago
by:
Guest
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Tests:
Push
original_array = [1,2,3,4,5] original_array.push(6)
Spread
let original_array = [1,2,3,4,5] original_array = [...original_array, 6]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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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 the provided benchmark and explain what's being tested. **Benchmark Overview** The benchmark is designed to compare two approaches for adding an element to an array in JavaScript: using the `push()` method versus the spread operator (`...`). **Test Cases** There are two individual test cases: 1. **Push**: This test case uses the traditional way of pushing a new element onto an array using the `push()` method. 2. **Spread**: This test case uses the spread operator to create a new array with the original elements followed by the new element. **What's being tested?** The benchmark is measuring the performance difference between these two approaches: * How efficient is it to add an element to an array using `push()`. * How efficient is it to add an element to an array using the spread operator (`...`). **Pros and Cons of each approach:** 1. **Push**: * Pros: + Wide support across browsers and platforms. + Easy to read and understand. * Cons: + May involve copying the entire array, which can be memory-intensive for large arrays. 2. **Spread**: * Pros: + More concise and expressive syntax. + Can be faster for small arrays, as it only creates a new reference to the original array without copying its elements. * Cons: + May not work correctly in older browsers or platforms that don't support spread operators. **Library usage** There is no explicit library mentioned in this benchmark. However, the `push()` method is a built-in JavaScript function, and the spread operator (`...`) was introduced in ECMAScript 2015 (ES6). **Special JS feature/syntax** The spread operator (`...`) is a new syntax introduced in ES6. It allows you to create a new array with the elements of an existing array by spreading it out into a new array. **Other alternatives** If you need to add an element to an array, there are other approaches available: 1. **Array.prototype.concat()**: This method creates a new array with the elements of the original array followed by the new element. 2. **Array.prototype.splice()**: This method modifies the original array by adding a new element at the specified index. However, these alternatives may not be as efficient or concise as using `push()` or the spread operator. I hope this explanation helps!
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