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boolean not to number
(version: 0)
Comparing performance of:
approach 1 vs approach 2
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var test = 1;
Tests:
approach 1
const test2 = +!test;
approach 2
const test2 = (test + 1) % 2;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
approach 1
approach 2
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Browser/OS:
Chrome 123 on Windows
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<iframe src="https://measurethat.net/Embed?id=516821" width="100%" height="500px"></iframe>
approach 2
16.9M/s
approach 1
16.8M/s
View exact numbers
Test name
Executions per second
✓
approach 2
16,924,552 Ops/sec
approach 1
16,826,336 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested, compared, and considered. **Benchmark Overview** The benchmark is designed to measure the performance of JavaScript code that attempts to convert a boolean value to a number using different approaches. **Benchmark Definition JSON** The benchmark definition provides some basic information: * `Name`: A descriptive name for the benchmark. * `Description`: None (empty). * `Script Preparation Code`: A script that sets up the test environment. In this case, it simply assigns the value 1 to a variable named `test`. * `Html Preparation Code`: None (empty). **Individual Test Cases** The benchmark consists of two test cases: 1. **Approach 1**: The first test case attempts to convert the boolean value `!test` to a number using the unary plus operator (`+`). This approach is often used in JavaScript. 2. **Approach 2**: The second test case uses a mathematical expression `(test + 1) % 2` to achieve the same result. **Library and Purpose** There is no explicit library mentioned in the benchmark definition. However, some libraries like `lodash` or `mathjs` might be used indirectly by relying on their built-in functions or utilities. **Special JS Feature/Syntax** Neither of the test cases relies on any special JavaScript features or syntax. **Comparison** The two approaches are compared to determine which one is faster: * **Approach 1**: Uses a unary plus operator (`+`) to convert `!test` to a number. * **Approach 2**: Uses a mathematical expression `(test + 1) % 2` to achieve the same result. **Pros and Cons** Here's a brief summary of each approach: * **Approach 1 (Unary Plus Operator)**: + Pros: Simple, widely supported. + Cons: Can be slower due to type coercion, which can lead to performance issues in some cases. * **Approach 2 (Mathematical Expression)**: + Pros: May be faster, as it avoids type coercion. + Cons: Less straightforward, requires a mathematical expression that might not be immediately obvious. **Other Considerations** In addition to the approaches themselves, other factors might affect the benchmark's results: * **Type Coercion**: JavaScript's type coercion rules can lead to performance issues when converting booleans to numbers. Approach 1 uses this coercion, while Approach 2 avoids it. * **Browser Support**: Both approaches are supported by most modern browsers, but some older versions or specific browser configurations might exhibit variations in performance. **Alternatives** Other ways to achieve the same result could be: * Using a different library function (e.g., `Number(!test)`) * Employing a different mathematical operation (e.g., using bitwise operations) * Utilizing a preprocessor or code transformation tool to optimize the code
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