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Array.prototype.concat vs spread operator2
(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:
7 years ago
by:
Guest
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HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>
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 = $.merge([1, 2], params);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Array.prototype.concat
spread operator
jQuery merge
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks. **Benchmark Definition** The provided JSON represents a benchmark definition, which outlines the scope and goals of the benchmark. Here's what we're testing: * We're comparing three approaches for concatenating arrays: + `Array.prototype.concat()` + The new ES6 spread operator (`...`) + jQuery's `$merge()` method * The test data includes an array of strings (`"hello"`) and a boolean value (`true`), which will be concatenated with an existing array `[1, 2]`. **Options Compared** We're comparing the performance of three different approaches: * `Array.prototype.concat()`: A traditional method for concatenating arrays, which creates a new array by combining the elements of two or more arrays. * The new ES6 spread operator (`...`): A feature that allows us to extract a subset of an object's properties using the syntax `objectPropertyNames [...object]`. In this case, we're using it to create a new array by spreading the elements of the input array (`params`). * jQuery's `$merge()` method: A utility function provided by jQuery that merges two or more arrays into one. **Pros and Cons** Here are some pros and cons for each approach: * `Array.prototype.concat()`: Pros: + Widely supported across different browsers + Easy to understand and use + Can be used with other array methods (e.g., `push()`, `slice()`) * Cons: + Creates a new array, which can lead to memory overhead + May not be as efficient as other approaches for large datasets * ES6 spread operator (`...`): + More concise and expressive than traditional concatenation + Can be used with other array methods (e.g., `concat()`, `map()`) + Widely supported across modern browsers * Cons: + May not work as expected in older browsers or environments that don't support the feature + Requires knowledge of the spread operator syntax * jQuery's `$merge()` method: + Provides a simple and concise way to merge arrays + Works well with other jQuery methods (e.g., `append()`, `html()`) + Requires inclusion of the jQuery library **Library Usage** The benchmark uses jQuery, which is a popular JavaScript library for DOM manipulation and event handling. In this case, we're using the `$merge()` method to concatenate arrays. **Special JS Feature or Syntax** The spread operator (`...`) is a new feature introduced in ECMAScript 2015 (ES6). It allows us to extract a subset of an object's properties using the syntax `objectPropertyNames [...object]`. In this benchmark, we're using it to create a new array by spreading the elements of the input array (`params`). **Other Alternatives** Some other alternatives for concatenating arrays include: * Using the `Array.prototype.push()` method and creating an empty array: `[...].push(...)` and then `_push` method calls. * Using the `Array.prototype.reduce()` method: `[1, 2, ...].reduce((a, b) => [...], a)` * Using a library like Lodash or Ramda for more functional programming approaches. Keep in mind that these alternatives might not be as concise or expressive as the spread operator or jQuery's `$merge()` method, but they can provide different trade-offs and use cases.
Related benchmarks:
Array.prototype.concat vs spread operator sans jquery
concat 2 arrays: Array.prototype.concat vs spread operator
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