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(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
push vs spread operator
Created:
5 years ago
by:
Guest
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Tests:
push
var params = [ "hello", true, 7 ]; var other = []; params.forEach(p => other.push(p));
spread operator
var params = [ "hello", true, 7 ] var other = [...params];
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
push
spread operator
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain what's being tested in this benchmark. **Overview** The benchmark is designed to compare two approaches for adding elements to an array: the traditional `concat()` method and the new ES6 spread operator (`...`). **Options Compared** There are two test cases: 1. **push**: This test case uses the traditional `forEach()` method with a callback function to push elements onto an array. 2. **spread operator**: This test case uses the ES6 spread operator (`...`) to create a new array by spreading elements from an existing array. **Pros and Cons** * **Traditional `concat()` method**: + Pros: Widely supported, easy to understand, and has been around for a long time. + Cons: Can be slow, especially when dealing with large arrays, because it creates a new array object on each invocation. * **ES6 spread operator (`...`)**: + Pros: Fast, efficient, and modern. It's also more concise and readable than the traditional `concat()` method. + Cons: Not as widely supported in older browsers or versions of JavaScript. **Library/Function Used** The benchmark doesn't use any external libraries, but it does rely on the built-in `forEach()` method, which is a part of the JavaScript language. **Special JS Feature/Syntax** This benchmark uses the ES6 spread operator (`...`), which was introduced in ECMAScript 2015. The syntax allows you to create a new array by spreading elements from an existing array or other iterable objects. **Other Alternatives** If you want to implement this benchmark yourself, here are some alternative approaches: * **Array.prototype.push()**: You can use the `push()` method directly on the array, which is even faster than using `concat()`. * **Array.from()**: Some browsers and versions of JavaScript support the `Array.from()` method, which can be used to create a new array by spreading elements from an iterable object. * **Looping and indexing**: You could also implement the benchmark by looping over the elements and adding them to the array using indexing. Keep in mind that these alternatives might not provide exactly the same results as the original test cases, so it's essential to verify their performance before comparing them.
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