Benchmark: check boolean vs !!

Tests:

Boolean
const a = '' const b = Boolean(a)
!!
const a = '' const b = !!a

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:

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

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Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The provided benchmark definition is a simple comparison between two approaches: using the `Boolean()` function and the `!!` operator to check if a string is falsy.

**What are we testing?**

We're comparing the performance of these two approaches:

1. **Boolean()**: This function returns `true` if its argument is truthy (i.e., non-empty, non-zero, etc.) and `false` otherwise.
2. **!!**: The double-bang operator (`!!`) converts its operand to a boolean value by:
	* If the operand is null or undefined, it returns `false`.
	* If the operand is 0, NaN, or an empty string, it returns `false`.
	* Otherwise, it returns `true`.

**Options compared**

The two options being compared are:

1. **Boolean()**: This method explicitly checks if a string is truthy using the `Boolean()` function.
2. **!!**: This operator uses a clever trick to quickly determine if a string is falsy.

**Pros and Cons of each approach**

1. **Boolean()**:
	* Pros: Explicit, easy to understand, and well-supported by most JavaScript engines.
	* Cons: May be slower due to the function call overhead.
2. **!!**:
	* Pros: Fast and efficient, as it uses a clever trick to quickly determine if a string is falsy.
	* Cons: Less explicit and may require more explanation or knowledge of the operator's behavior.

**Library usage**

None of the provided benchmark definitions use any libraries. The tests are self-contained and only rely on JavaScript itself.

**Special JS feature/syntax**

The `!!` operator uses the double-bang syntax, which is a special syntax in JavaScript that can be used to quickly convert an operand to a boolean value.

**Other alternatives**

If you want to test other approaches, here are some examples:

* Using the `String()` function to check if a string is truthy: `const b = String(a) !== ''`
* Using the `trim()` method to remove whitespace from a string before checking its truthiness
* Using a regular expression to match an empty string against a non-empty string

These alternatives would require modifying the benchmark definitions and test cases accordingly.

Related benchmarks:

check boolean vs !! (version: 0)

Comparing performance of: Boolean vs !!

Created: 3 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):