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Array.prototype.concat vs spread operator - no jQuery
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
Array.prototype.concat vs spread operator
Created:
2 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 ]
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Suite status:
<idle, ready to run>
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Test case name
Result
Array.prototype.concat
spread operator
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 data for the MeasureThat.net benchmark. **Benchmark Definition** The test is designed to compare two approaches: 1. **`Array.prototype.concat`**: This method concatenates two arrays and returns a new array containing all elements from both input arrays. 2. **Spread operator (`...`)**: This is a new syntax introduced in ES6 (EcmaScript 2015) that allows expanding an array into individual elements. **Pros and Cons** * `Array.prototype.concat`: * **Pros**: More predictable behavior, as it returns a new array without modifying the original. It's also more widely supported across different browsers. * **Cons**: Can be slower due to the overhead of creating a new array. Also, if you're using a large number of elements in your array, it can lead to memory issues. * Spread operator (`...`): * **Pros**: More concise and expressive code, as it avoids the need for explicit concatenation. It also has better performance for larger arrays, since it only requires a single operation to add all elements. * **Cons**: Less predictable behavior, especially when dealing with non-array values or nested objects. **Library** There is no specific library used in this benchmark, as both `Array.prototype.concat` and the spread operator are built-in JavaScript methods. **Special JS Feature/Syntax** The benchmark uses a special ES6 syntax introduced in 2015: the spread operator (`...`). This was not widely supported until later versions of browsers and Node.js. The use of `concat()` is more traditional, which makes it easier to support older browsers. **Alternative Approaches** Other alternatives to both approaches could include: * Using other array concatenation methods like `Array.prototype.push()`, `Array.prototype.splice()`, or libraries like Lodash. * Implementing custom solution that iterates through the elements and adds them one by one.
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