Benchmark: check array size with and without neg

Script Preparation code:

var arr = ['1', '2', '3'];

Tests:

check true
if (arr.length) { return arr; } return undefined;
check false
if (!arr.length) { return ; } return arr;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
check true
check false

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and test cases to help explain what's being tested.

**Benchmark Definition**

The benchmark definition is represented as a JSON object that contains the following properties:

* `Name`: A descriptive name for the benchmark, which in this case is "check array size with and without neg".
* `Description`: An empty string, indicating that there is no description provided.
* `Script Preparation Code`: A snippet of JavaScript code that initializes an array `arr` containing three elements: `'1'`, `'2'`, and `'3'`.
* `Html Preparation Code`: An empty string, indicating that no HTML code is required.

The script preparation code sets up a constant array `arr` before running the benchmark. This allows the benchmark to focus on measuring the performance of the JavaScript code inside the test cases.

**Individual Test Cases**

There are two test cases defined:

1. **"check true"`:
	* The benchmark definition contains the following JavaScript code: `if (arr.length) { return arr; } return undefined;`
	* This test case checks whether the array length is truthy, and if so, returns the entire array.
2. **"check false"`:
	* The benchmark definition contains the following JavaScript code: `if (!arr.length) { return ; } return arr;`
	* This test case checks whether the array length is falsy, and if so, returns an empty value (in this case, nothing, which is equivalent to `undefined`).

**Comparison of Options**

The two test cases differ in how they handle the presence or absence of elements in the array:

1. **"check true"`:
	* Returns the entire array when its length is truthy.
	* This approach assumes that the primary use case for this benchmark is when the array contains values, and the performance impact is negligible.
2. **"check false"`:
	* Returns an empty value (nothing) when the array length is falsy.
	* This approach can be seen as a negation of the first test case, but it's unclear whether this is the primary use case or if there's another reason for including this test.

**Pros and Cons**

The pros and cons of each approach are:

1. **"check true"`:
	+ Pros: This approach focuses on a common use case, and the performance impact of returning an array when its length is truthy is likely to be negligible.
	+ Cons: It may not accurately represent scenarios where the array is empty or null.
2. **"check false"`:
	+ Pros: This approach highlights an important edge case that might have been overlooked in the primary use case.
	+ Cons: It returns nothing when the array is empty, which can be considered a "false positive" or unnecessary result.

**Library Usage**

There doesn't appear to be any library usage in these benchmark definitions. The code relies solely on standard JavaScript features and syntax.

**Special JS Features/Syntax**

None are explicitly mentioned or utilized in this benchmark definition. However, it's worth noting that the use of `return` statements with no explicit value can have implications for the behavior of some browsers or environments, especially when dealing with falsy values like `undefined`.

**Other Alternatives**

For a more comprehensive set of test cases, you might consider adding additional scenarios to cover:

1. **Empty array**: Test what happens when the array is empty (`arr.length === 0`).
2. **Null array**: Test what happens when the array is null or undefined.
3. **Large array**: Test the performance impact of working with a large array (e.g., thousands or millions of elements).
4. **Edge cases**: Consider adding test cases that cover specific edge cases, such as:
	* Array with negative length
	* Array with non-numeric values

These additional test cases can provide more insight into how the JavaScript engine handles array operations and improve the overall accuracy of the benchmark results.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36

Browser/OS: Chrome 106 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
check true	14652589.0 Ops/sec
check false	14760359.0 Ops/sec

Related benchmarks:

check array size with and without neg (version: 0)

Comparing performance of: check true vs check false

Created: 2 years ago by: Guest

Jump to the latest result

check true

check false

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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