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|| vs ??
(version: 0)
Comparing performance of:
|| vs ??
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var a var b = 5
Tests:
||
var c = a || b
??
var d = a ?? b
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
||
??
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. **Benchmark Definition** The `Script Preparation Code` is used to prepare the JavaScript environment for each test case, which in this case are the logical OR (`||`) and logical NOT NULL (`??`) operators. The code defines two variables, `a` and `b`, where `b` is assigned the value 5. **Individual Test Cases** There are two test cases: 1. `var c = a || b`: This test case uses the logical OR operator (`||`). It's trying to evaluate whether the variable `c` should be set to either the value of `a` or the value 5 (assigned to `b`). The purpose is to measure which browser performs better in terms of performance when using this specific operator. 2. `var d = a ?? b`: This test case uses the logical NOT NULL (`??`) operator, also known as the nullish coalescing operator. It's trying to evaluate whether the variable `d` should be set to either the value of `a` or the value 5 (assigned to `b`). The purpose is similar to the previous test case. **Options Compared** The two options being compared are: * Using the logical OR (`||`) operator * Using the logical NOT NULL (`??`) operator **Pros and Cons** **Logical OR (`||`) Operator:** Pros: * Wide support across most browsers and platforms * Easy to understand and use * Can be used for various purposes beyond just comparing values Cons: * May lead to unexpected behavior if one of the operands is not a value (e.g., null, undefined) * May perform type conversions or coercions that can impact performance **Logical NOT NULL (`??`) Operator:** Pros: * Explicitly handles null and undefined values * Avoids potential issues with type conversions or coercions * Provides a more concise way of handling missing or null values Cons: * Less widely supported across older browsers and platforms (especially before Safari 13) * May be unfamiliar to some developers, requiring additional explanation or context. **Library Used** None. The test cases only use built-in JavaScript operators (`||` and `??`). **Special JS Features/Syntax** No special features or syntax are mentioned in the provided code snippets. **Alternatives** If you wanted to compare other logical operators or methods for handling null and undefined values, some alternatives could include: * `&&` (logical AND) operator * `typeof` and conditional statements (`if (typeof a !== 'undefined')`) * Using `isNaN()` or `isFinite()` checks * Utilizing libraries like Lodash or Ramda for more robust handling of missing values However, the `||` and `??` operators are generally well-suited for this type of benchmarking, as they provide a concise and expressive way to handle default values in most cases.
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