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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 = $.merge([1, 2], params);
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Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Array.prototype.concat
spread operator
jQuery merge
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what is being tested, compared, and their pros and cons. **Benchmark Overview** The benchmark compares three approaches to concatenate arrays: 1. `Array.prototype.concat()` 2. The new ES6 spread operator (`...`) 3. jQuery's `$merge()` method **Options Compared** * **`Array.prototype.concat()`**: a traditional method for concatenating arrays, which creates a new array by copying the elements from both arrays and then assigning it to a new variable. * **The new ES6 spread operator (`...`)**: a concise way to create a new array by spreading the elements of an existing array into a new array. This method is more efficient than `concat()` because it avoids creating a temporary array. * **jQuery's `$merge()` method**: a utility function provided by jQuery that concatenates arrays. **Pros and Cons** * **`Array.prototype.concat()`**: + Pros: widely supported, easy to understand, and widely used. + Cons: creates a new array, which can be inefficient for large datasets. * **The new ES6 spread operator (`...`)**: + Pros: concise, efficient, and supports modern browsers. + Cons: may not work in older browsers, and some developers might find it less intuitive than `concat()`. * **jQuery's `$merge()` method**: + Pros: widely supported by jQuery users, easy to use for those familiar with jQuery. + Cons: adds an extra dependency (jQuery), and the implementation can be slower due to additional overhead. **Library** The benchmark uses jQuery, a popular JavaScript library that provides a wide range of utility functions for manipulating HTML documents. In this case, the `$merge()` method is used to concatenate arrays. **Special JS Feature or Syntax** None of the tested methods rely on any special JavaScript features or syntax beyond ES6 spread operator (`...`), which is a standard feature introduced in ECMAScript 2015. **Other Alternatives** If you're interested in exploring alternative approaches, here are a few options: * Using `Array.prototype.push()` and assigning the result to a new variable. * Using `Array.concat()` from the `Array` constructor (not to be confused with the prototype method). * Using native array methods like `flat()`, which can concatenate arrays. * Using other libraries or frameworks that provide similar concatenation functions. Keep in mind that the performance differences between these approaches may vary depending on the specific use case and browser/JavaScript environment.
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