Benchmark: Creating Uids v2

Script Preparation code:


  function simpleUid() {
        return Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);
    }
    
  function uuid4() {
        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
            let r = Math.random() * 16 | 0;
            let v = c === 'x' ? r : (r & 0x3 | 0x8);
            return v.toString(16);
        });
    }

function generateUniqueId(length) {
    let result = '';
    const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    const charactersLength = characters.length;

    for (let i = 0; i < length; i++) {
        result += characters.charAt(Math.floor(Math.random() * charactersLength));
    }

    return result;
}

function simpleUidL(length) {
    let result = '';
    while (result.length < length) {
        result += Math.random().toString(36).substring(2, 15);
    }
    return result.substring(0, length);
}

Tests:

Simple Uid
let uid = simpleUid();
UUID4
let uid = uuid4();
Variable length uid
let uid = generateUniqueId(21);
Simple UID with variable length
let uid = simpleUidL();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Simple Uid
UUID4
Variable length uid
Simple UID with variable length

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark definition is a set of JavaScript functions that generate unique identifiers (UIDs). There are four different approaches:

1. `simpleUid()`: Generates a random string using `Math.random().toString(36).substring(2, 15)`. This approach produces a random-looking string but lacks any inherent structure or predictability.
2. `uuid4()`: Generates a UUID (Universally Unique Identifier) according to the RFC 4122 standard. This approach produces a fixed-length, unique identifier that can be used for identifying objects without collisions.
3. `generateUniqueId(length)`: Generates a random string of a specified length using a character set. This approach allows for variable-length IDs but may produce strings with predictable patterns if the length is too short.
4. `simpleUidL(length)`: A variation of `simpleUid()` that generates a random string and then truncates it to a specified length. This approach combines the unpredictability of `simpleUid()` with some level of structure.

**Comparison**

The benchmark compares the performance of each UID generation function across different test cases:

* `Simple Uid` (using `simpleUid()`)
* `UUID4` (using `uuid4()`)
* `Variable length uid` (using `generateUniqueId(21)`)
* `Simple UID with variable length` (using `simpleUidL()`)

**Pros and Cons**

Here's a brief summary of the pros and cons for each approach:

1. `simpleUid()`:
	* Pros: Easy to implement, produces random-looking strings.
	* Cons: Lack of structure, predictability, and collisions.
2. `uuid4()`:
	* Pros: Unique, predictable, and collision-resistant identifiers.
	* Cons: Fixed length, may not be suitable for all use cases.
3. `generateUniqueId(length)`:
	* Pros: Allows variable-length IDs, can produce interesting patterns.
	* Cons: May produce strings with predictable patterns if length is too short.
4. `simpleUidL(length)`:
	* Pros: Combines unpredictability with some structure.
	* Cons: Can be slower than other approaches due to the truncation step.

**Libraries and Special Features**

None of the provided functions rely on external libraries or special JavaScript features (e.g., async/await, Promises). The `uuid4()` function does use a simple string manipulation approach to generate UUIDs, but it's still a relatively straightforward implementation.

**Alternatives**

If you're interested in exploring alternative approaches for generating UID, here are some options:

1. `crypto` module: JavaScript provides the built-in `crypto` module, which offers functions for generating cryptographically secure random numbers and UUIDs.
2. Third-party libraries: There are many third-party libraries available that provide more robust and feature-rich UID generation capabilities, such as `uuidjs` or `uuid-v4`.
3. WebAssembly (WASM): If you're interested in exploring WASM-based approaches, there are some libraries and tools available for generating UID using WASM.

Keep in mind that each approach has its strengths and weaknesses, and the choice ultimately depends on your specific requirements and constraints.

Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser/OS: Chrome 129 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Simple Uid	1939726.4 Ops/sec
UUID4	350545.8 Ops/sec
Variable length uid	368353.3 Ops/sec
Simple UID with variable length	29353132.0 Ops/sec

Related benchmarks:

Creating Uids v2 (version: 1)

Create different types of UID

Comparing performance of: Simple Uid vs UUID4 vs Variable length uid vs Simple UID with variable length

Created: one month ago by: Registered User

Jump to the latest result

Simple Uid

UUID4

Variable length uid

Simple UID with variable length

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):