Benchmark: Boolean vs !! operation 1212

Tests:

Boolean
const a = { a: 1 } const b = 3 const c = 0 const d = undefined const e = null const f = "hello" const g = [1, 2] const arr = [a, b, c, d, e, f, g] arr.map(item => Boolean(item))
!!
const a = { a: 1 } const b = 3 const c = 0 const d = undefined const e = null const f = "hello" const g = [1, 2] const arr = [a, b, c, d, e, f, g] arr.map(item => !!item)

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:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**What is being tested?**

The benchmark compares the performance of two ways to check if a value is "truthy" or not: using the `Boolean()` function and using the double-exclamation mark (`!!`) operator.

In JavaScript, a truthy value is considered true in a boolean context, while a falsy value is considered false. The `Boolean()` function converts its argument to a boolean value, while the `!!` operator forces its operand to be either true (0 is converted to 1) or false (non-zero values are converted to 1).

**Options compared:**

* **Boolean() function**: This method uses the built-in `Boolean()` function to convert its argument to a boolean value. The function returns `true` for truthy values and `false` for falsy values.
* **!! operator**: This method uses the double-exclamation mark (`!!`) operator to force its operand to be either true (0 is converted to 1) or false (non-zero values are converted to 1).

**Pros and Cons of each approach:**

* **Boolean() function**:
	+ Pros:
		- Easy to read and understand
		- More straightforward to use for simple checks
	+ Cons:
		- May be slower due to the function call overhead
* **!! operator**:
	+ Pros:
		- Often faster than `Boolean()` due to the operator's compile-time optimization
	+ Cons:
		- Less readable and may require extra parentheses to ensure correct usage

It's worth noting that while the `!!` operator might be slightly faster, it can also lead to errors if not used carefully. The `Boolean()` function is generally safer to use.

**Library:**

There is no explicit library being tested in this benchmark. However, some libraries like Lodash or Underscore.js may provide similar functionality, such as the `_.isBoolean()` or `_.isTrue()` methods, which might be of interest to developers who are already familiar with those libraries.

**Special JS feature or syntax:**

There is no special JavaScript feature or syntax being used in this benchmark. Both approaches rely on standard JavaScript language features.

**Other alternatives:**

If you're looking for alternative ways to check if a value is truthy, you might consider using:

* The `typeof` operator with the `in` keyword (e.g., `typeof x === 'object'`)
* The `instanceof` operator (e.g., `x instanceof Object`)
* A custom implementation using bitwise operations or other methods

However, these alternatives may have their own performance trade-offs and are generally less straightforward to use than the `Boolean()` function or `!!` operator.

Related benchmarks:

Boolean vs !! operation 1212 (version: 0)

Comparing performance of: Boolean vs !!

Created: 2 years ago by: Guest

Jump to the latest result

Boolean

!!

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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