Benchmark: getCasePermutationsLongerArrayOnly

Script Preparation code:

function getCasePermutations(S, idx, substr, result) {
	if (idx === S.length) {
		result.push(substr);
		return;
	}

	const char = S[idx];
	const nextIdx = idx + 1;

	if (char >= '0' && char <= '9') {
		getCasePermutations(S, nextIdx, substr + char, result);
		return;
	}
	getCasePermutations(S, nextIdx, substr + char.toLowerCase(), result);
	getCasePermutations(S, nextIdx, substr + char.toUpperCase(), result);

	return result;
}

function getCasePermutationsArr(S, idx, subStrArr, result) {
	if (idx === S.length) {
		result.push(subStrArr.join(''));
		return;
	}

	const char = S[idx];
	const nextIdx = idx + 1;

	if (char >= '0' && char <= '9') {
		subStrArr.push(char);
		getCasePermutationsArr(S, nextIdx, subStrArr, result);
		subStrArr.pop();
		return;
	}
	subStrArr.push(char.toLowerCase());
	getCasePermutationsArr(S, nextIdx, subStrArr, result);
	subStrArr.pop();

	subStrArr.push(char.toUpperCase());
	getCasePermutationsArr(S, nextIdx, subStrArr, result);
	subStrArr.pop();

	return result;
}

Tests:

Array version
const testString = "a1b2c3d4e5f6g7h8i9j0"; getCasePermutationsArr(testString, 0, [], [])
String version
const testString = "a1b2c3d4e5f6g7h8i9j0"; getCasePermutations(testString, 0, '', [])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array version
String version

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 the provided benchmark and explain what's being tested.

**Benchmark Definition:**

The benchmark defines two functions, `getCasePermutations` and `getCasePermutationsArr`, which generate all possible permutations of a given string containing digits (0-9) in both lowercase and uppercase. The difference between these two functions lies in how they construct the permutations:

* `getCasePermutations`: It recursively builds permutations by appending each digit to the current substring, converting it to lowercase and uppercase before appending.
* `getCasePermutationsArr`: It uses an array to build permutations, pushing each digit onto the array, generating all permutations by recursively calling itself with the next index and then popping the last element from the array.

**Options Compared:**

The benchmark compares two versions of the function:

1. **Array version (getCasePermutationsArr)**: Uses an array to construct permutations.
2. **String version (getCasePermutations)**: Recursively builds permutations by appending each digit to a substring.

**Pros and Cons of Each Approach:**

* **Array version (getCasePermutationsArr)**:
	+ Pros:
		- More intuitive and easier to understand for some developers
		- Allows for easy addition or removal of digits from the array
	+ Cons:
		- May lead to stack overflow errors due to recursive calls
		- Can be slower due to overhead of array operations
* **String version (getCasePermutations)**:
	+ Pros:
		- More efficient in terms of memory usage, as it only uses a single string
		- Can be faster due to optimized string concatenation and substring extraction
	+ Cons:
		- Less intuitive and more difficult to understand for some developers
		- May lead to performance issues if the input string is very large

**Library/Functionality Used:**

The benchmark uses JavaScript's built-in `const` keyword, template literals (`\r\n`), and recursive function calls.

**Special JS Feature/Syntax:**

The benchmark does not use any special or advanced JavaScript features. However, it relies on the `const` keyword to declare variables, which is a modern JavaScript feature introduced in ECMAScript 2015 (ES6).

**Other Alternatives:**

For this specific problem, the two approaches have different trade-offs in terms of performance and memory usage. Depending on the use case, one approach might be more suitable than the other.

If you need to generate permutations of a large string, the **string version (getCasePermutations)** might be a better choice due to its potential for better performance and reduced memory usage.

On the other hand, if you need to handle arrays or vectors and perform operations on them, the **array version (getCasePermutationsArr)** might be more suitable.

Keep in mind that this benchmark is specifically designed to compare two approaches, not to optimize the code for a particular use case. In general, choosing between these approaches would depend on the specific requirements of your project.

Related benchmarks:

getCasePermutationsLongerArrayOnly (version: 0)

Comparing performance of: Array version vs String version

Created: 3 years ago by: Guest

Jump to the latest result

Array version

String version

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):