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Array.prototype.concat vs spread operator 12312h313
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
Array.prototype.concat vs spread operator
Created:
3 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:
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Test case name
Result
Array.prototype.concat
spread operator
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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 two approaches for concatenating arrays: the traditional `Array.prototype.concat()` method and the new ES6 spread operator (`...`). **Options Compared** Two options are compared: 1. **`Array.prototype.concat()`**: This method takes an array as an argument and returns a new array that is the concatenation of the original array and the provided array. 2. **Spread Operator (`...`)**: This operator allows for element-wise expansion of arrays. In this case, it's used to concatenate two arrays by spreading the elements of the `params` array into the existing array `[1, 2]`. **Pros and Cons** * **`Array.prototype.concat()`** * Pros: * Widely supported across older browsers. * Can be more readable for developers familiar with the method. * Cons: * Can lead to performance issues due to the creation of a new array object. * May not be suitable for very large arrays. * **Spread Operator (`...`)** * Pros: * More concise and expressive than `concat()`. * Reduces memory allocation by avoiding the creation of an intermediate array object. * Widely supported across modern browsers. However, keep in mind that using spread operators with older browsers might lead to performance issues. **Library** None. **Special JS Features/Syntax** The test case uses the ES6 spread operator (`...`). This feature was introduced in ECMAScript 2015 (ES6) and allows for element-wise expansion of arrays.
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