Benchmark: Boolean constructor vs double negotiation trick in javascript - with added single negation test

Script Preparation code:

var bFalse = false;
var sEmpty = '';
var sFilled = 'Foo';
var nZero = 0;
var nOne = 1;

Tests:

Boolean
Boolean(bFalse) Boolean(sEmpty) Boolean(sFilled) Boolean(nZero) Boolean(nOne)
Double negation trick
!!bFalse !!sEmpty !!sFilled !!nZero !!nOne
Single negation
!bFalse !sEmpty !sFilled !nZero !nOne

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Boolean
Double negation trick
Single negation

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/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Windows

View result in a separate tab

Test name	Executions per second
Boolean	1180479.4 Ops/sec
Double negation trick	3636697.8 Ops/sec
Single negation	3556214.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks and explore what's being tested in this specific benchmark.

**Benchmark Overview**

The provided JSON represents a JavaScript benchmark that compares three different approaches to creating Boolean values: the `Boolean` constructor, the "double negation trick" (`!!` operator), and single negation (`!` operator). The benchmark aims to measure which approach is the most efficient.

**Options Compared**

1. **Boolean Constructor**: This method creates a new Boolean object using the `Boolean` function.
2. **Double Negation Trick**: This method uses the `!!` operator, which applies double negation to the input value. For example, `!!false` becomes `true`.
3. **Single Negation**: This method uses the `!` operator, which applies a single negation to the input value.

**Pros and Cons of Each Approach**

1. **Boolean Constructor**:
	* Pros: Creates a new Boolean object with the correct type and value.
	* Cons: May incur additional overhead due to object creation.
2. **Double Negation Trick**:
	* Pros: Can be faster since it doesn't involve creating an object or using any function calls.
	* Cons: May not work as expected for certain values (e.g., `!!0` returns `true`, while `Boolean(0)` returns `false`).
3. **Single Negation**:
	* Pros: Simple and efficient, with minimal overhead.
	* Cons: May not be supported in older JavaScript engines or browsers.

**Library Used**

None of the options explicitly rely on a library, but some may interact with libraries or built-in functions that might introduce additional overhead.

**Special JS Features/Syntax**

The `!!` operator is a shorthand for double negation, which can be confusing for some developers. It's essential to note that this operator has non-standard behavior and should be used with caution.

**Benchmark Result**

The latest benchmark result shows the execution speed per second (ExecutionsPerSecond) for each test case:

* **Boolean**: 1180479.375 executions/second
* **Double Negation Trick**: 3636697.75 executions/second
* **Single Negation**: 3556214.0 executions/second

The double negation trick appears to be the fastest approach, followed closely by single negation.

**Alternative Approaches**

Other approaches to creating Boolean values could include:

1. Using a ternary operator (`true` value ? true : false`)
2. Assigning a string value to a variable and using the `Boolean()` function
3. Utilizing bitwise operations (e.g., shifting bits)

However, these alternatives might not be as efficient or straightforward as the options being compared in this benchmark.

In conclusion, this benchmark highlights the importance of micro-optimization and performance testing in JavaScript development. By understanding the trade-offs between different approaches to creating Boolean values, developers can make informed decisions about which methods to use in their applications.

Related benchmarks:

Boolean constructor vs double negotiation trick in javascript - with added single negation test (version: 0)

Comparing performance of: Boolean vs Double negation trick vs Single negation

Created: 4 years ago by: Guest

Jump to the latest result

Boolean

Double negation trick

Single negation

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):