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Array slice vs for loop testsdfdfsdfsdf
(version: 0)
Comparing performance of:
slice vs push
Created:
3 years ago
by:
Guest
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Tests:
slice
function createPhoneNumber(arr) { return `(${arr.slice(0, 3).join('')}) ${arr.slice(3, 6).join('')}-${arr.slice(6).join('')}`; } console.log(createPhoneNumber([1,2,3,4,5,6,7,8,9,0])) console.log(createPhoneNumber([3,5,7,1,2,0,9,8,6,4]))
push
function createPhoneNumber(arr) { let formatted='('; for (let i=0; i<arr.length; i++) { if (i == 3) formatted +=') '; else if (i == 6) formatted +='-'; formatted += arr[i]; } return formatted; } console.log(createPhoneNumber([1,2,3,4,5,6,7,8,9,0])) console.log(createPhoneNumber([3,5,7,1,2,0,9,8,6,4]))
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Suite status:
<idle, ready to run>
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Test case name
Result
slice
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 its test cases. **Benchmark Purpose:** The main goal of this benchmark is to compare the performance of two approaches to extract and format phone numbers from an array of digits. The first approach uses `Array.slice()` to extract specific parts of the array, while the second approach uses a traditional `for` loop with conditional statements to achieve the same result. **Options Compared:** The benchmark compares the following two options: 1. **Using `Array.slice()`:** This method involves extracting specific parts of the array using `slice()` and then joining them together to form the phone number. 2. **Using a traditional `for` loop:** This approach uses a `for` loop to iterate through the array, checking for specific conditions (e.g., reaching index 3 or 6) to append digits to the formatted string. **Pros and Cons:** * **Array.slice()**: + Pros: Concise and readable code; efficient for large arrays. + Cons: May incur overhead due to function call and array manipulation; + Potential issue: If the input array is not a multiple of 3 or 6, the slice operation may not work as expected. * **Traditional `for` loop**: + Pros: Tight control over iteration and formatting; no dependency on array manipulation functions; + Cons: More verbose code; potential performance issues due to string concatenation and conditional statements. **Library/Library-like functionality:** In the provided benchmark, there is no explicit library being used. However, some libraries like `lodash` or `underscore.js` might be used in a real-world implementation to simplify array manipulation and string formatting tasks. **Special JS Features/Syntax:** There are no specific JavaScript features or syntax being tested here, such as async/await, promise chaining, or modern ES6+ features. The benchmark is focused on the performance comparison of two basic approaches. **Other Considerations:** * **Input Data:** The input data for this benchmark consists of two arrays: `[1,2,3,4,5,6,7,8,9,0]` and `[3,5,7,1,2,0,9,8,6,4]`. These examples are carefully chosen to demonstrate the performance difference between the two approaches. * **Device Platform:** The benchmark is run on a Linux desktop with Chrome 101 browser. **Alternatives:** Other alternatives for formatting phone numbers from an array of digits might include: * Using regular expressions to extract and format the digits * Employing a dedicated library or module specifically designed for phone number parsing (e.g., `phonenumbers` in Node.js) * Implementing a custom solution using a combination of JavaScript techniques, such as array manipulation, string formatting, and conditional statements. Keep in mind that this benchmark is primarily focused on comparing the performance of two specific approaches, rather than evaluating alternative solutions.
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