Benchmark: Single function vs Multiple functions

Script Preparation code:

function single(url) {
      var out = {};
      var protocol = url.match(/^[^:]+/)[0];
      var domain = url.match(/(?:\/{2})([^/]+)/)[1];
      var paths = url.match(/(?:\/{2}[^\/]+\/)([^?]+)/)[1].split('/');
      var query = url.match(/(?:[?])([^#]+)/)[1].split(/&/g).reduce((result, next) => {
        var [key, value] = next.split(/=/);
        result[key] = value || '';
        return result;
      }, {});
      
      var hash = url.match(/(?:[#])([\S\s]+)/)[1].split(/&/g).reduce((result, next) => {
        var [key, value] = next.split(/=/);
        result[key] = value || '';
        return result;
      }, {});
  
      out.protocol = protocol;
      out.domain = domain;
      out.paths = paths;
      out.query = query;
      out.hash = hash;
      return out;
    }
  
    function multi(url) {
      var out = {
        protocol: getProtocol(url),
        domain: getDomain(url),
        paths: getPaths(url),
        query: getQuery(url),
        hash: getHash(url),
      };
      return out;
    }
  
    function getProtocol(url) {
      return url.match(/^[^:]+/)[0];
    }
  
    function getDomain(url) {
      return url.match(/(?:\/{2})([^/]+)/)[1];
    }
  
    function getPaths(url) {
      return url.match(/(?:\/{2}[^\/]+\/)([^?]+)/)[1].split('/');
    }
  
    function getQuery(url) {
      return url.match(/(?:[?])([^#]+)/)[1].split(/&/g).reduce((result, next) => {
        var [key, value] = next.split(/=/);
        result[key] = value || '';
        return result;
      }, {});
    }
  
    function getHash(url) {
      return url.match(/(?:[#])([\S\s]+)/)[1].split(/&/g).reduce((result, next) => {
        var [key, value] = next.split(/=/);
        result[key] = value || '';
        return result;
      }, {});
    }

Tests:

Single
single('http://preview.sub.domain.org.com/path1/path2/?a=1&b2#c=3&d=4')
Multi
multi('http://preview.sub.domain.org.com/path1/path2/?a=1&b2#c=3&d=4')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

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Test case name	Result
Single
Multi

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Slowest: N/A

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

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Let's dive into the explanation of the provided benchmark.

**Benchmark Definition**

The benchmark is comparing two approaches: single function vs multiple functions (or single responsibility) in performance. The script preparation code defines two functions, `single` and `multi`, which extract specific information from a URL string.

The `single` function extracts all the necessary information directly within itself, while the `multi` function uses smaller helper functions (`getProtocol`, `getDomain`, `getPaths`, `getQuery`, and `getHash`) to perform these tasks. The idea is to test whether using separate functions for each task improves performance compared to a single function that handles everything.

**Options Compared**

Two options are being compared:

1. **Single Function**: The `single` function, which extracts all information from the URL string in a single pass.
2. **Multiple Functions**: The `multi` function and its corresponding helper functions (`getProtocol`, `getDomain`, etc.), which extract information from the URL string using smaller, focused functions.

**Pros and Cons**

**Single Function (single)**

Pros:

* Easier to understand and maintain due to fewer lines of code.
* Potential for better cache locality since all variables are accessed in a single scope.

Cons:

* May be slower due to unnecessary overhead from extracting information multiple times.

**Multiple Functions (multi)**

Pros:

* Can potentially be faster due to reduced overhead from repeated function calls.
* Easier to reuse and test individual functions independently.

Cons:

* More lines of code can increase complexity and make it harder to understand.
* Potential for slower cache locality since each variable is accessed in a separate scope.

**Other Considerations**

When choosing between single and multiple functions, consider the following factors:

* **Reusability**: If you expect to reuse the extracted information in other parts of your codebase, using smaller helper functions might be beneficial. However, if the information is only used once, a single function might be sufficient.
* **Performance overhead**: In general, repeated function calls can introduce overhead due to creation and destruction of stack frames, argument passing, etc. If performance is critical, using multiple functions might be a better choice.

**Library and Helper Functions**

The benchmark uses two helper functions:

1. `getProtocol(url)`: Extracts the protocol (e.g., "http" or "https") from the URL string.
2. `getDomain(url)`, `getQuery(url)`, `getHash(url)`: Similar to `getProtocol`, these functions extract specific parts of the URL string.

These helper functions are defined within the `multi` function and can be reused in other contexts if needed.

**Special JS Features or Syntax**

The benchmark does not use any special JavaScript features or syntax that would require additional explanation.

**Alternatives**

If you're interested in exploring alternative approaches, consider the following:

1. **Caching**: Implement caching mechanisms to reduce the overhead of repeated function calls.
2. **Just-In-Time (JIT) Compilation**: Consider using JIT compilers like V8 (in Chrome) or SpiderMonkey (in Firefox) to analyze and optimize your JavaScript code.
3. **Parallelization**: Use parallel processing techniques, such as Web Workers or async/await with `fetch()`, to take advantage of multiple CPU cores.

Keep in mind that the choice of approach ultimately depends on your specific use case, performance requirements, and personal preferences.

Related benchmarks:

Single function vs Multiple functions (version: 0)

Single function vs Single responsibility in performance

Comparing performance of: Single vs Multi

Created: 7 years ago by: Guest

Jump to the latest result

Single

Multi

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):