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Array.prototype.concat vs spread operator
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
Array.prototype.concat vs spread operator vs jQuery merge
Created:
8 years ago
by:
Guest
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Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [...[1, 2] , ...params ]
jQuery merge
var params = [ "hello", true, 7 ]; var other = $.merge([1, 2], params);
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Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Array.prototype.concat
spread operator
jQuery merge
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON for the Array.prototype.concat vs spread operator benchmark. **Benchmark Definition** The benchmark compares two approaches to concatenate arrays in JavaScript: the traditional `concat()` method and the new ES6 spread operator (`...`). **Options Compared** 1. **Array.prototype.concat**: The traditional way of concatenating arrays using the `concat()` method. 2. **Spread Operator (`...`)**: A new feature introduced in ES6 that allows for more concise array creation. **Pros and Cons of Each Approach** * **Array.prototype.concat**: + Pros: Widely supported, well-documented, and easy to understand. + Cons: Can be slower than the spread operator due to the overhead of creating a new function call. * **Spread Operator (`...`)**: + Pros: More concise and expressive, which can lead to more readable code. It also avoids the creation of an intermediate array, making it potentially faster. + Cons: May not be supported in older browsers or environments. **Library Used** In one of the test cases, jQuery is used as a library. Specifically, `$.merge()` is used, which is a part of the jQuery API for merging arrays. * **jQuery merge (`$.merge()`)**: A function provided by jQuery that merges two arrays into a new array. It's not the most efficient way to concatenate arrays and is only necessary if you're using jQuery for other reasons. **Special JS Feature/Syntax** The spread operator (`...`) is a special feature in JavaScript introduced in ES6 (EcmaScript 2015). It allows for more concise array creation and has become a popular way to work with arrays in modern JavaScript code. **Other Considerations** When choosing between `concat()` and the spread operator, consider the following: * If you're working on older browsers or environments that don't support the spread operator, use `concat()`. * If you're writing new code and want more concise and expressive array creation, use the spread operator. * Keep in mind that while the spread operator can be faster than `concat()` for large arrays, the difference is usually negligible unless you're dealing with very large datasets. **Alternatives** Other alternatives to concatenating arrays include: * Using `Array.prototype.push()` to add elements to an array and then creating a new array from it. * Using libraries like Lodash or Underscore.js, which provide utility functions for working with arrays.
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