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Array spread operator vs push custom
(version: 0)
Compare the new ES6 spread operator with the traditional push
Comparing performance of:
spread operator vs Push
Created:
4 years ago
by:
Guest
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Tests:
spread operator
const headers = [ { text: 'TARİH', key: 'date', width: '25%' }, { text: 'İŞLEM', key: 'processType', width: '25%' } ]; const detail = { text: 'İŞLEM DETAYI', key: 'detail', width: '50%' }; const newHeaders = [...headers, detail];
Push
const headers = [ { text: 'TARİH', key: 'date', width: '25%' }, { text: 'İŞLEM', key: 'processType', width: '25%' } ]; const detail = { text: 'İŞLEM DETAYI', key: 'detail', width: '50%' }; const newHeaders = headers.push(detail);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
spread operator
Push
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 benchmark and explain what's being tested, the different approaches compared, their pros and cons, and other considerations. **Benchmark Overview** The benchmark compares two ways to add an element to an array in JavaScript: using the spread operator (`[...headers, detail]`) and the traditional `push` method (`headers.push(detail)`). **Options Compared** 1. **Spread Operator**: This method uses the new ES6 spread operator (`[...]`) to create a new array by copying elements from the original array (`headers`) and adding the new element (`detail`). The pros of this approach are: * Readability: The code is more concise and easier to understand. * Performance: In some cases, the spread operator can be faster than `push` because it avoids the overhead of a function call. * Flexibility: The spread operator allows for more complex array operations. Cons: * Overhead: Creating a new array can lead to performance issues if the original array is large. 2. **Push Method**: This method uses the `push` method of the array to add a new element at the end of the array. The pros of this approach are: * Performance: `push` is often faster than the spread operator because it avoids creating a new array. Cons: * Readability: The code can be less readable due to the use of a function call. * Flexibility: `push` is less flexible than the spread operator, as it only adds elements at the end of the array. **Library Used** None. This benchmark doesn't rely on any external libraries. **Special JS Feature or Syntax** The spread operator is a new feature introduced in ES6 (EcmaScript 2015). It's a shorthand way to create arrays and objects from iterable values, such as arrays, strings, or objects. **Benchmark Preparation Code and Test Cases** The benchmark code consists of two test cases: 1. The first test case uses the spread operator: `const newHeaders = [...headers, detail];` 2. The second test case uses the traditional `push` method: `const newHeaders = headers.push(detail);` These test cases create an array `headers` with two elements and a new object `detail`. They then compare the execution time of adding `detail` to the end of `headers` using both methods. **Other Alternatives** While the spread operator is a convenient way to add elements to arrays, other alternatives exist: 1. **Array.prototype.concat()**: This method creates a new array by concatenating two or more arrays. While it's not as concise as the spread operator, it can be useful in certain situations. 2. **Array.prototype.unshift()**: This method adds one or more elements to the beginning of an array. It's similar to `push`, but adds elements at the start instead of the end. In summary, the benchmark compares two ways to add elements to arrays in JavaScript: using the spread operator and the traditional `push` method. The spread operator offers better readability and flexibility but can lead to performance issues for large arrays. The `push` method is often faster but less readable and flexible.
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