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Array concat vs spread operator vs push____
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method and push
Comparing performance of:
Array.prototype.concat vs spread operator vs Push
Created:
6 years ago
by:
Guest
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Tests:
Array.prototype.concat
const params = [ ...Array(10000).keys() ]; const other = params.concat(10000);
spread operator
const params = [ ...Array(10000).keys() ] const other = [...params,10000 ]
Push
const params = [ ...Array(10000).keys() ]; params.push(10000);
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Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Array.prototype.concat
spread operator
Push
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, compared, and their pros and cons. **Benchmark Overview** The MeasureThat.net website is comparing the performance of three ways to concatenate an array: `Array.prototype.concat()`, the spread operator (`...`), and `push()`. **Test Cases** There are three test cases: 1. **`Array.prototype.concat()`**: This method concatenates two arrays using the `concat()` function. 2. **Spread Operator (`...`)**: This syntax is used to create a new array by spreading elements from an existing array or array-like object. 3. **`push()`**: This method adds one or more elements to the end of an array. **Comparison** The benchmark is comparing these three methods to see which one performs best in terms of execution speed. **Pros and Cons:** * **`Array.prototype.concat()`**: + Pros: Easy to use, well-supported by browsers. + Cons: Creates a new array object, can be slower than other methods due to overhead of creating a new object. * **Spread Operator (`...`)**: + Pros: Concise syntax, creates a new array without the overhead of creating an intermediate object. + Cons: May not work as expected in older browsers or with certain array-like objects. * **`push()`**: + Pros: Fast and efficient way to append elements to an array. + Cons: Can be slower than other methods for large arrays, as it involves modifying the existing array. **Library/External Functionality** None of the test cases use any external libraries or functions. They only rely on built-in JavaScript features. **Special JS Features/Syntax** The spread operator (`...`) is a relatively new feature introduced in ECMAScript 2015 (ES6). It's supported by most modern browsers and Node.js versions, but may not work in older browsers or environments. **Other Alternatives** If you're looking for alternative ways to concatenate arrays, some other options include: * `Array.prototype.slice().concat()`: This method creates a new array by slicing the original array and then concatenating it with another array. * `Array.prototype.splice()`: This method can be used to add elements to an array, but may not be as efficient as using `push()`. Keep in mind that these alternative methods may have different performance characteristics compared to the three methods being tested in this benchmark.
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