Benchmark: Boolean and !! comparison

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const testBool = [];

Tests:

Boolean
console.log(Boolean(testBool));
!!
console.log(!!testBool);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Boolean
!!

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 143 on Android

View result in a separate tab

Test name	Executions per second
Boolean	236529.9 Ops/sec
!!	209220.8 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 7 months ago):

LLMs can make mistakes. Check important info.

The benchmark "Boolean and !! comparison" is designed to compare two different methods for coercing an array (here, `testBool`) into a boolean value in JavaScript. The primary focus is on performance, observing how quickly each method can execute in a routine environment.

### Options Being Compared:
1. **Boolean(testBool)**
   - This uses the `Boolean` function to convert a value to its boolean equivalent.
   - **Test Case:**
     ```javascript
     console.log(Boolean(testBool));
     ```

2. **!!testBool**
   - This uses the double negation operator (`!!`) to convert the array to its boolean equivalent. The first `!` negates the truthiness of the value, and the second `!` negates the negation back to the original truthiness (hence obtaining a boolean).
   - **Test Case:**
     ```javascript
     console.log(!!testBool);
     ```

### Pros and Cons of Each Approach:

**Boolean(testBool):**
- **Pros:**
  - Clear and explicit about intention; it’s immediately understood as a type conversion to a boolean.
  - Follows JavaScript's functional style, which may be favored in functional programming paradigms.

- **Cons:**
  - Slightly more verbose than using the `!!` operator, which might be perceived as less elegant by some developers.

**!!testBool:**
- **Pros:**
  - Concise and quick to write, which can make the code less cluttered.
  - Often recognized and used by JavaScript enthusiasts, giving it a bit of a “developer cool factor.”

- **Cons:**
  - Potentially less readable for those unfamiliar with the double negation trick, which might confuse those newer to JavaScript.

### Considerations:
- Performance: The benchmark results indicate the number of executions per second for each method, which helps in assessing which approach is more performant in a given environment. For the provided data, both methods display similar performance, with `Boolean(testBool)` executing 403,976.125 times per second, while `!!testBool` executes 402,873.125 times. 
- Context: The context in which these conversions are used can influence which method is preferable. In performance-critical applications, even slight differences could be significant in tight loops.

### Alternative Approaches:
1. **Conditional Statements:**
   Using a direct conditional check (e.g., `if (testBool) { return true; } else { return false; }`) can also return a boolean value but is generally less concise than the aforementioned methods.

2. **Ternary Operator:**
   A single-line expression using a ternary operator (e.g., `return testBool ? true : false;`) achieves the same result, but is also more verbose and primarily used when more control over the return value is required.
  
Each of these alternatives has its context of use and readability considerations based on the target audience of your code.

In conclusion, the benchmark provides a practical insight into two common JavaScript idioms for boolean conversion, highlighting considerations in terms of clarity and performance that can guide best practices in code efficiency and maintainability.

Related benchmarks:

Boolean and !! comparison (version: 1)

Js

Comparing performance of: Boolean vs !!

Created: 7 months ago by: Guest

Jump to the latest result

Boolean

!!

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 7 months ago):