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Array.prototype.concat vs spread operator - objAssignTwo
(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
const params = { "foo": [], "bar": [], "baz":[] }; const newObj = Object.assign({}, params); newObj.foo = "FOO"; return newObj;
spread operator
const params = { "foo": [], "bar": [], "baz":[] }; return {...params, foo: "FOO",}
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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):
Let's dive into the world of MeasureThat.net and explore what's being tested in this benchmark. **Benchmark Overview** The benchmark is designed to compare two approaches for creating a new object by copying an existing one: `Array.prototype.concat` (traditional method) and the ES6 spread operator (`...`). The goal is to determine which approach is faster, more efficient, or both. **Options Compared** Two options are being compared: 1. **Array.prototype.concat**: This traditional method uses the `concat()` function to create a new array by concatenating multiple arrays. 2. **ES6 Spread Operator (`...`)**: This new feature allows creating a new object by spreading an existing object into the desired form. **Pros and Cons of Each Approach** Here's a brief summary of the pros and cons of each approach: * **Array.prototype.concat**: + Pros: widely supported, easy to understand. + Cons: can be slower than other methods, may lead to unnecessary array creations. * **ES6 Spread Operator (`...`)**: + Pros: concise, efficient, and modern. + Cons: may not work as expected in older browsers or environments. **Library Usage** None of the test cases uses any external libraries. The `Object.assign()` function is used in both benchmarks to create a new object by copying an existing one. **Special JS Feature/Syntax** The ES6 spread operator (`...`) is a relatively new feature introduced in ECMAScript 2015 (ES6). It allows creating a new object by spreading an existing object into the desired form, making it a concise alternative to traditional object creation methods. **Other Alternatives** Before settling on these two approaches, other alternatives could have been considered: * `Object.create()`: This method creates a new object with respect to the given prototype. * Destructuring assignment: Although not directly applicable to this benchmark, destructuring can be used to create a new object by extracting specific properties from an existing one. Keep in mind that these alternative approaches might not be as concise or efficient as the spread operator or `concat()` method. The benchmark seems well-structured and focuses on comparing two fundamental aspects of JavaScript: traditional array manipulation (`concat()`) versus modern object creation with the spread operator.
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