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Array.prototype.concat vs spread operator noJQuery
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
Array.prototype.concat vs spread operator
Created:
7 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
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided JSON represents a JavaScript microbenchmark test case on MeasureThat.net. The benchmark compares the performance of two approaches for merging arrays in JavaScript: the traditional `concat()` method and the new ES6 spread operator. **What is tested** In this benchmark, the following options are compared: 1. **Array.prototype.concat()**: This method creates a new array by concatenating two or more arrays. 2. **Spread operator (`...`)**: This operator was introduced in ECMAScript 2015 (ES6) and allows for spreading elements of an array into another array. **Pros and Cons** Here are the pros and cons of each approach: * **Array.prototype.concat()**: + Pros: widely supported, easy to use, and well-documented. + Cons: creates a new array, which can be memory-intensive for large inputs. * **Spread operator (`...`)**: + Pros: efficient, fast, and modern. It also allows for more flexible merging of arrays. + Cons: requires ECMAScript 2015 (ES6) support, and its syntax might be unfamiliar to some developers. **Library** In this benchmark, no specific JavaScript library is used beyond the standard library and the `concat()` method itself. **Special JS feature or syntax** The spread operator (`...`) introduced in ES6 is a special feature of modern JavaScript. It allows for spreading elements of an array into another array, which can be more concise and efficient than using `concat()`. The benchmark takes advantage of this feature to compare its performance with the traditional approach. **Other alternatives** If you wanted to test other approaches, here are some alternative methods: * **Array.prototype.push()**: This method adds one or more elements to the end of an array. * **Array.prototype.splice()**: This method modifies an existing array by removing and/or replacing specified elements and/or elements at a specified position. * **Array.prototype.slice()**: This method returns a shallow copy of a portion of an array. These alternatives might be worth exploring if you're interested in optimizing array merging in JavaScript. However, the spread operator (`...`) remains a popular choice due to its concise syntax and efficient performance. **Benchmark preparation code** The provided JSON does not include any script or HTML preparation code, as it only defines the benchmark itself. The actual test case is likely defined in a separate file or included through a URL.
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