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Array.prototype.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 jQuery merge vs Push
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 = $.merge([1, 2], params);
Push
var params = [ "hello", true, 7 ]; params.push(1); params.push(2); var other = params;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
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Test case name
Result
Array.prototype.concat
spread operator
jQuery merge
Push
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark compares the performance of three different approaches for creating arrays: `Array.prototype.concat`, the spread operator (`...`), and the `push()` method. **Test Cases** There are four test cases: 1. **Array.prototype.concat**: This test case uses the traditional `concat()` method to concatenate an array with another array. 2. **Spread Operator**: This test case uses the spread operator (`...`) to create a new array by spreading elements from an existing array. 3. **jQuery merge**: This test case uses the jQuery library's `$merge` function to concatenate arrays. 4. **Push**: This test case uses the `push()` method to add elements to an array and then creates a new array by assigning it to another variable. **Comparison** The comparison is between the performance of these four approaches: * `Array.prototype.concat` * Spread Operator (`...`) * jQuery merge * Push **Options Compared** The options compared are: * Concatenation methods (traditional `concat()`, spread operator) * Array creation methods (push, merge) * Library usage (jQuery's `$merge` function) **Pros and Cons** Here are some pros and cons of each approach: 1. **Array.prototype.concat** * Pros: Simple, widely supported, and well-documented. * Cons: Can be slow for large arrays due to its iterative nature. 2. **Spread Operator (`...`)** * Pros: Fast, concise, and modern. It avoids the overhead of creating a new array by concatenating multiple elements. * Cons: Requires modern JavaScript versions (ES6+). 3. **jQuery merge** * Pros: Convenient for jQuery developers who are already familiar with its API. However, it may not be as efficient as other methods due to additional overhead from the library. * Cons: Adds unnecessary dependency on the jQuery library. 4. **Push** * Pros: Very simple and fast for small arrays or when used correctly (by creating a new array explicitly). * Cons: May not be suitable for larger arrays where its performance might degrade due to repeated `push()` operations, which can lead to frequent reallocations of the underlying array. **Library Usage** In this benchmark, jQuery is used in the "jQuery merge" test case. The `$merge` function concatenates two arrays and returns a new array containing all elements from both input arrays. **Special JS Feature/Syntax** None of the test cases utilize any special JavaScript features or syntax other than modern ES6+ spread operator (`...`).
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