Benchmark: randomtoarray - MeasureThat.net

Script Preparation code:

var possibilities = {
    lowerCased: 'abcdefghijklmnopqrstuvwxyz',
    capitals: 'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
    numbers: '0123456789',
    special: '~!@#$%^&()_+-={}[];\','
};

function randomId(len, pattern) {
    if (!len) len = 30;
    if (!pattern) pattern = 'aA0';

    var chars = '';

    pattern.split('').forEach((a) => {
        if (!isNaN(parseInt(a))) {
            chars += possibilities.numbers;
        } else if (/[a-z]/.test(a)) {
            chars += possibilities.lowerCased;
        } else if (/[A-Z]/.test(a)) {
            chars += possibilities.capitals;
        } else {
            chars += possibilities.special;
        }
    });

    var result = '';

    for (var i = 0; i < len; i++) {
        result += chars.charAt(Math.floor(Math.random() * chars.length));
    }

    return result;
}

function randomId2(len = 30, pattern = 'aA0') {
  let chars = '';
  let pl = pattern.length;
  while (pl--) {
    const ch = pattern[pl];
    if (!isNaN(ch)) {
      chars += possibilities.numbers;
    } else if (ch === ch.toLowerCase() && ch !== ch.toUpperCase()) {
      chars += possibilities.lowerCased;
    } else if (ch !== ch.toLowerCase() && ch === ch.toUpperCase()) {
      chars += possibilities.capitals;
    } else {
      chars += possibilities.special;
    }
  }
  
  let result = [];
  const cl = chars.length;
  while (len--) {
    result.push(chars[Math.floor(Math.random() * cl)]);
  }
  
  return result.join('');
}

Tests:

randomId
randomId(1000000, 'aA0-');
randomid2
randomId2(1000000, 'aA0-');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
randomId
randomid2

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of what is tested in this benchmark.

**Script Preparation Code:**

The script preparation code defines two functions, `randomId` and `randomId2`, which generate random IDs in different ways.

- `randomId(len, pattern)`: This function takes a length (`len`) and a pattern (default `'aA0'`) as input. It generates a character array based on the pattern, where:
	+ Numbers are represented by the `numbers` property of the `possibilities` object.
	+ Lowercase letters are represented by the `lowerCased` property.
	+ Uppercase letters are represented by the `capitals` property.
	+ Special characters are represented by the `special` property.

The function then generates a random ID by concatenating the characters in the array and returning it.

- `randomId2(len = 30, pattern = 'aA0')`: This function is similar to `randomId`, but with some differences:
	+ The pattern is only used to determine which character set to use (numbers, lowercase letters, uppercase letters, or special characters).
	+ If the pattern contains a lowercase letter that is not equal to its uppercase equivalent, it uses the lowercase version.
	+ If the pattern contains an uppercase letter that is not equal to its lowercase equivalent, it uses the uppercase version.
	+ The function then generates a random ID by concatenating the characters in the `pattern` string and returning them as a single string.

**Benchmark Definition:**

The benchmark definition specifies two test cases:

- `randomId(1000000, 'aA0-')`: This test case calls the `randomId` function with a length of 1,000,000 and the pattern `'aA0-'`.
- `randomId2(1000000, 'aA0-')`: This test case calls the `randomId2` function with a length of 1,000,000 and the same pattern as the previous one.

**Comparison:**

The two functions are compared in terms of their performance. The benchmark measures the number of executions per second for each function.

**Pros and Cons:**

- **`randomId`**: This function is more flexible, as it allows the user to specify a custom pattern. However, this flexibility comes at the cost of performance, as the function needs to check the pattern more often.
- **`randomId2`**: This function is faster, but it has some limitations:
	+ It only generates characters based on the specified pattern, which may not be desirable for all use cases.
	+ It uses a different approach to generate the random ID, which may affect its performance and randomness.

**Library:**

There is no explicit library mentioned in this benchmark. However, the `possibilities` object suggests that it might be using a predefined character set.

**Special JS Features or Syntax:**

- The use of template literals (e.g., `'aA0-'`) is not specific to any particular JavaScript version or syntax.
- The use of arrow functions (e.g., `(a) => { ... }`) is also not specific to any particular JavaScript version or syntax.

**Alternatives:**

If you need a more efficient random ID generator, you might consider using a cryptographically secure pseudo-random number generator (CSPRNG) library. Some popular options include:

- `crypto` module in Node.js
- `random-seed` library
- `rand` library

Alternatively, if you need a more flexible random ID generator, you might consider using a library like `uuid` or `random-uuid`, which provide different approaches to generating unique IDs.

Related benchmarks:

randomtoarray (version: 0)

Comparing performance of: randomId vs randomid2

Created: 7 years ago by: Guest

Jump to the latest result

randomId

randomid2

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):