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Embedded if (2)
(version: 0)
Comparing performance of:
Classic if vs Embedded if
Created:
3 years ago
by:
Guest
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Script Preparation code:
var existingUser = { username: 'a', email: 'a' }; var username = 'a'; var email = 'a';
Tests:
Classic if
if (existingUser) { if (existingUser.username == username) return true; if (existingUser.email == email) return true; }
Embedded if
if (existingUser?.username == username) return true; if (existingUser?.email == email) return true;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Classic if
Embedded if
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON data and explain what's being tested, compared, and considered. **Benchmark Definition** The benchmark definition is a JavaScript code snippet that measures the performance of conditional statements (specifically, if-else statements). The script preparation code creates two variables, `existingUser` and `username/email`, which are used to construct an if-else statement. The goal is to compare the execution time of two different if-else statements: 1. **Classic if**: This approach uses a traditional if-else statement with separate conditions for checking username and email equality. 2. **Embedded if**: This approach uses a nested if-else statement, where one condition checks if `existingUser` exists, and within that scope, another condition checks the equality of `username` and `email`. **Options Compared** The two approaches are compared in terms of their execution time. The benchmark aims to measure which approach is faster. **Pros and Cons** 1. **Classic if**: * Pros: More traditional syntax, easier to read and understand. * Cons: May lead to slower performance due to the additional condition checks. 2. **Embedded if**: * Pros: Can potentially be faster since it reduces the number of condition checks within the scope of `existingUser`. * Cons: Syntax can be less readable and may require more mental effort to understand. **Library/Functionality Used** In this benchmark, a null check operator (`?.`) is used in the **Embedded if** approach. This is a feature introduced in JavaScript (ECMAScript 2020) called "Optional Chaining". It allows you to access nested properties or call methods on an object without causing an error if the property or method does not exist. **Special JS Feature/Syntax** The null check operator (`?.`) used in the **Embedded if** approach is a special feature introduced in ECMAScript 2020. This syntax helps prevent errors when working with potentially null or undefined values. **Other Alternatives** If you were to rewrite this benchmark using different approaches, some alternatives could be: * Using `if (existingUser)` without the nested if-else statement. * Using a more complex condition structure, such as `if (existingUser && existingUser.username == username) return true;`. * Using a loop instead of an if-else statement to compare both conditions. Please note that these alternatives may not be suitable for this specific benchmark, and the chosen approach is intended to measure the performance difference between two specific syntaxes.
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