Benchmark: !! vs >1 - MeasureThat.net

Tests:

!!
const array1 = [1, 2]; const isValid = !!array1.length;
> 1
const array1 = [1, 2]; const isValid = array1.length > 1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
!!
> 1

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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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 the MeasureThat.net benchmark.

The test is comparing two approaches to check if an array has at least one element:

1. `!!array.length` (double notching)
2. `array.length > 1`

**Options being compared:**

* Double notching (`!!array.length`): This approach uses a bitwise NOT operator (`!!`) to convert the boolean value of `array.length` to an integer. If `array.length` is truthy, it becomes 0, and if it's falsy (i.e., 0), it becomes 1. Then, another `!!` operation negates this result. In JavaScript, a non-zero value (either from `true` or the number 1) is coerced to `true`, while 0 is coerced to `false`.
* Comparing length (`array.length > 1`): This approach uses a simple comparison operator (`>`) to check if the array length is greater than 1.

**Pros and Cons of each approach:**

* Double notching (`!!array.length`):
	+ Pros:
		- Can be faster due to shorter code path (only two operations instead of one).
		- May have better cache locality since it involves fewer memory accesses.
	+ Cons:
		- Can lead to unexpected behavior if the array is very large, as it may overflow `Number.MAX_SAFE_INTEGER` and wrap around to a small number.
		- Less readable and maintainable due to its unusual syntax.
* Comparing length (`array.length > 1`):
	+ Pros:
		- More readable and maintainable due to its straightforward syntax.
		- Easier to understand the intent of the code, as it directly conveys that we're checking if the array has more than one element.
	+ Cons:
		- May be slower due to additional operations (one comparison instead of two).

**Library usage:**

There is no explicit library mentioned in this benchmark. However, `Array.prototype.length` is a built-in property of the Array prototype.

**Special JS features or syntax:**

None mentioned in this specific benchmark.

**Benchmark preparation code and HTML preparation code:**

The provided JSON data does not contain any script preparation code or HTML preparation code. This suggests that the test cases are designed to be self-contained and can be executed directly without additional setup.

**Other alternatives:**

Some alternative approaches to check if an array has at least one element might include:

* Using `array.some()` with a callback function that returns a boolean value indicating whether the array should be considered valid.
* Using `array.every()` with a callback function that returns a boolean value indicating whether all elements in the array meet some condition.
* Using a custom implementation that manually iterates over the array to check its length.

However, these alternatives may not be as concise or efficient as the double notching and comparing length approaches used in this benchmark.

Related benchmarks:

!! vs >1 (version: 0)

Comparing performance of: !! vs > 1

Created: 3 years ago by: Guest

Jump to the latest result

!!

> 1

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):