Benchmark: Generate UUID using crypto.randomUUID

Tests:

String.prototype.replace
crypto.randomUUID().replace(/-/g, "");
String.prototype.replaceAll
crypto.randomUUID().replaceAll("-", "");
String.prototype.split
crypto.randomUUID().split("-").join("");
Array.prototype.map
[...crypto.randomUUID()].map((v, i) => [8, 13, 18, 23].includes(i) ? "" : v).join("");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String.prototype.replace
String.prototype.replaceAll
String.prototype.split
Array.prototype.map

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition JSON**

The provided JSON represents a benchmark definition, which is essentially a script that generates a random UUID using `crypto.randomUUID()`. The `replace(/-/g, "")` function is applied to this string, replacing all hyphens with an empty string. This is the "Benchmark Definition" field in the JSON.

**Options Compared**

There are four test cases:

1. **String.prototype.replace**: Replaces all hyphens (`-`) with an empty string using `replace(/-/g, "")`.
2. **String.prototype.replaceAll**: Replaces all hyphens (`-`) with an empty string using a separate function (not shown in the provided code).
3. **String.prototype.split**: Splits the UUID at each hyphen and joins the resulting array of strings back together.
4. **Array.prototype.map**: Maps over the characters of the UUID, replacing each hyphen if its index is within a certain range.

**Pros and Cons**

Here are some pros and cons of each approach:

1. **String.prototype.replace**:
	* Pros: Simple, straightforward, and fast (since it's a built-in method).
	* Cons: May not be the most efficient solution for large strings or performance-critical code.
2. **String.prototype.replaceAll**:
	* Pros: Could be optimized for better performance if implemented correctly.
	* Cons: Requires implementation of a separate function, which might add overhead.
3. **String.prototype.split**:
	* Pros: Can handle multiple hyphens and split the string into an array of substrings.
	* Cons: May have higher overhead due to the creation of an array and repeated joins.
4. **Array.prototype.map**:
	* Pros: Can be used with other array methods (e.g., `filter`, `reduce`) for more complex processing.
	* Cons: Requires working with arrays, which might not be necessary in this specific use case.

**Libraries and Special JS Features**

There are no libraries explicitly mentioned in the provided code. However, `crypto.randomUUID()` is a built-in JavaScript function that generates a cryptographically secure random UUID. This function uses Web Cryptography API, which is a W3C-standardized API for generating and managing cryptographic keys and other cryptographic functions.

**Other Alternatives**

If you wanted to test alternative approaches, you might consider:

1. Using `replace()` with a regular expression (e.g., `/-/g`).
2. Implementing your own UUID generation algorithm.
3. Testing different data structures (e.g., strings, arrays, objects) for performance.
4. Investigating the performance of other string manipulation methods (e.g., `indexOf()`, `substr()`).

Keep in mind that these alternatives would require significant modifications to the benchmark code and might not be directly comparable to the original test cases.

I hope this explanation helps! Let me know if you have further questions or need more clarification on any point.

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0

Browser/OS: Firefox 123 on Windows

View result in a separate tab

Test name	Executions per second
String.prototype.replace	560343.6 Ops/sec
String.prototype.replaceAll	548199.8 Ops/sec
String.prototype.split	522349.3 Ops/sec
Array.prototype.map	174363.5 Ops/sec

Related benchmarks:

Generate UUID using crypto.randomUUID (version: 2)

Comparing performance of: String.prototype.replace vs String.prototype.replaceAll vs String.prototype.split vs Array.prototype.map

Created: 8 months ago by: Registered User

Jump to the latest result

String.prototype.replace

String.prototype.replaceAll

String.prototype.split

Array.prototype.map

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):