Benchmark: UUID m21ethods - MeasureThat.net

Script Preparation code:

function generateUUID() { // Public Domain/MIT
    var d = new Date().getTime(); //Timestamp
    var d2 = (performance && performance.now && (performance.now() * 1000)) || 0; //Time in microseconds since page-load or 0 if unsupported
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = Math.random() * 16; //random number between 0 and 16
        if (d > 0) { //Use timestamp until depleted
            r = (d + r) % 16 | 0;
            d = Math.floor(d / 16);
        } else { //Use microseconds since page-load if supported
            r = (d2 + r) % 16 | 0;
            d2 = Math.floor(d2 / 16);
        }
        return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16);
    });
}


function uuidv4() {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    const r = Math.random() * 16 | 0,
          v = c == 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
}

Tests:

uuidv4
for (var i=0; i<10000; i++){ uuidv4(); }
generateUUID
for (var i=0; i<10000; i++){ generateUUID(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
uuidv4
generateUUID

Fastest: N/A

Slowest: N/A

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/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
uuidv4	32.0 Ops/sec
generateUUID	16.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON for MeasureThat.net, explaining what's being tested and comparing different approaches.

**Benchmark Definition JSON**

The JSON defines two benchmark tests:

1. `uuidv4`: This test uses the `uuidv4` function from the generated JavaScript code. The purpose of this function is to generate a random UUID (Universally Unique Identifier).
2. The generated JavaScript code also contains another function called `generateUUID`. Although not explicitly mentioned in the JSON, it's likely that `generateUUID` and `uuidv4` are variants of each other or share similarities.

**Comparison of Options**

The benchmark tests compare two approaches:

a) `generateUUID`: This approach uses a timestamp-based method to generate UUIDs. It's a simple and widely used method.
b) `uuidv4`: This approach uses a different, more modern method for generating UUIDs, which is based on random numbers.

**Pros and Cons**

1. **generateUUID**:
	* Pros: Simple, widely supported, and easy to implement.
	* Cons: May not be as efficient or secure as the `uuidv4` method.
2. **uuidv4**:
	* Pros: More efficient and secure than the timestamp-based method, especially when generating large numbers of UUIDs.
	* Cons: May require more computational resources (CPU cycles) compared to the `generateUUID` method.

**Library/Functionality Used**

There is no explicit library mentioned in the JSON. However, the `uuidv4` function seems to be a custom implementation, likely based on the [RFC 4122](https://tools.ietf.org/html/rfc4122) standard for generating UUIDs.

**Special JavaScript Feature/Syntax**

The benchmark tests utilize the following special JavaScript feature:

* The `performance.now()` function is used in both the `generateUUID` and `uuidv4` functions to get the current timestamp in microseconds since page-load (if supported). This allows for a more efficient method of generating UUIDs, especially when compared to using a simple timestamp-based approach.

**Other Alternatives**

If you're interested in exploring alternative methods for generating UUIDs, here are some examples:

* The `uuid` library: A widely used JavaScript library for generating UUIDs.
* The [js-uuid](https://github.com/borismus/js-uuid) library: Another popular JavaScript library for generating UUIDs.

Keep in mind that the choice of method depends on your specific use case, performance requirements, and security concerns.

Related benchmarks:

UUID m21ethods (version: 0)

Comparing performance of: uuidv4 vs generateUUID

Created: 2 years ago by: Guest

Jump to the latest result

uuidv4

generateUUID

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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