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spread vs pop vs shift
(version: 0)
Compare spread vs pop vs shift
Comparing performance of:
spread vs push vs unshift
Created:
3 years ago
by:
Guest
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Tests:
spread
const params = [ "hello", true, 7 ]; const [el, ...etc] = params const r = el + ', world!'
push
const params = [ 7, true, "hello" ] const el = params.pop() const r = el + ', world!'
unshift
var params = [ "hello", true, 7 ] const el = params.shift() const r = el + ', world!'
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
spread
push
unshift
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks. **Benchmark Definition** The provided JSON defines a benchmark called "spread vs pop vs shift". This benchmark compares three different ways to access elements in an array: using the spread operator (`...`), `pop()`, and `shift()` methods. The goal is to determine which approach is the fastest. **Options Compared** There are three options being compared: 1. **Spread Operator (`...`)**: This allows you to create a new array by taking a subset of elements from an existing array. In this benchmark, it's used to extract the first element (`el`) and then concatenate it with a string. 2. **`pop()` method**: This removes and returns the last element in the array. In this benchmark, it's used to remove the last element (`el`) before concatenating it with a string. 3. **`shift()` method**: This removes and returns the first element from the array. In this benchmark, it's used to extract the first element (`el`) and then concatenate it with a string. **Pros and Cons of Each Approach** 1. **Spread Operator (`...`)**: * Pros: Fast and efficient, as it creates a new array without modifying the original one. * Cons: May incur overhead due to array creation and copying. 2. **`pop()` method**: * Pros: Simple and efficient, as it modifies the existing array by removing an element. * Cons: May be slower if the array is large or has many elements. 3. **`shift()` method**: * Pros: Similar to `pop()`, but with a slightly different behavior when used with arrays of varying lengths. * Cons: May also incur overhead due to array modification. **Library and Purpose** None of the benchmarked methods rely on any external libraries. They are all built-in JavaScript features that operate on native arrays. **Special JS Feature or Syntax** There is no specific JavaScript feature or syntax being tested in this benchmark, other than the use of spread operator (`...`), which is a relatively recent addition to the language (introduced in ECMAScript 2015). **Other Alternatives** If you wanted to compare these approaches using different data structures or algorithms, some alternatives could be: * Using `unshift()` instead of `push()` for adding elements to the beginning of an array. * Comparing the performance of `map()`, `filter()`, and `forEach()` methods for iterating over arrays. * Testing the performance of other JavaScript engines, such as Node.js, Safari, or Firefox. Keep in mind that these alternatives would require significant changes to the benchmark definition and implementation.
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