Benchmark: titlepipemergedprefixremovalw

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

  function transformOld(value) {
      return value
          // remove d_, dt_ case insensitive
          .replace(/(^dt?_|^jn_)/i, '')
          // insert a space between lower & upper and correct case
          .replace(
              /([a-z])(_?)([A-Z])(.)/g, (match, endOfLower, underscorePrefix, firstUpperCaseCharacter, secondCharacter) => {
                  if (!underscorePrefix && secondCharacter !== secondCharacter.toUpperCase()) {
                      firstUpperCaseCharacter = firstUpperCaseCharacter.toLowerCase();
                  }
                  return `${endOfLower} ${firstUpperCaseCharacter}${secondCharacter}`;
              }
          )
          // remove all _
          .replace(/_+/g, ' ')
          // space before last upper in a sequence followed by lower
          .replace(/([A-Z]+)([A-Z])/g, (match, beforeLastUpper, lastUpper) => `${beforeLastUpper} ${lastUpper.toLowerCase()}`)
          // uppercase the first character
          .replace(/^./, (str) => str.toUpperCase())
  }

  function transformNew(value) {
      return _.flow(
          removePrefixes,
          splitLowerUpperCaseAndFixCase,
          splitUnderscore,
          splitAllUpperLowerCase,
          upperCaseFirstCharacter
      )(value);
  }

  function removePrefixes(value) {
      return value.replace(/(^dt?_|^jn_)/i, '');
  }

  function splitLowerUpperCaseAndFixCase(value) {
      return value.replace(
          /([a-z])(_?)([A-Z])(.)/g,
          (match, endOfLower, underscorePrefix, firstUpperCaseCharacter, secondCharacter) => {
              if (!underscorePrefix && secondCharacter !== secondCharacter.toUpperCase()) {
                  firstUpperCaseCharacter = firstUpperCaseCharacter.toLowerCase();
              }
              return `${endOfLower} ${firstUpperCaseCharacter}${secondCharacter}`;
          }
      );
  }

  function splitUnderscore(value) {
      return value.replace(/_+/g, ' ');
  }

  function splitAllUpperLowerCase(value) {
      return value.replace(
          /([A-Z]+)([A-Z])/g,
          (match, beforeLastUpper, lastUpper) => `${beforeLastUpper} ${lastUpper.toLowerCase()}`
      );
  }

  function upperCaseFirstCharacter(value) {
      return value.replace(/^./, (str) => str.toUpperCase());
  }

  function transformWithoutFlow(value) {
      return upperCaseFirstCharacter(splitAllUpperLowerCase(splitUnderscore(splitLowerUpperCaseAndFixCase(removePrefixes(value)))));
  }

var testString = 'abcdefHij_Klm';

Tests:

transformOld
transformOld(testString);
transformNew
transformNew(testString);
transformWithoutFlow
transformWithoutFlow(testString);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
transformOld
transformNew
transformWithoutFlow

Fastest: N/A

Slowest: N/A

Latest run results:

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

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I'm excited to dive into the world of JavaScript microbenchmarks!

**Benchmark Definition JSON**

The provided Benchmark Definition JSON represents a test case for measuring the performance of two different transformation functions in JavaScript: `transformOld` and `transformNew`. The benchmark aims to compare the execution speed of these two functions.

**What is being tested?**

Two main aspects are being compared:

1. **Original implementation (`transformOld`)**: This function contains a custom implementation of string transformations, including prefix removal, case correction, and character replacement.
2. **Library-based implementation (`transformNew`)**: This function utilizes the popular `Lodash` library for its `flow` function, which applies multiple functions in sequence to process the input data.

**Options compared**

The two main options being compared are:

1. **Custom implementation (`transformOld`)**
	* Pros:
		+ Can be optimized and tuned for specific use cases.
		+ Provides more control over the transformation process.
	* Cons:
		+ May require more code and maintenance effort.
		+ Might not be as efficient or performant as a library-based approach.
2. **Library-based implementation (`transformNew`)**
	* Pros:
		+ Utilizes an established, optimized library for string transformations.
		+ Reduces the need for custom coding and maintenance.
	* Cons:
		+ May introduce additional dependencies and overhead.
		+ Limited control over the transformation process.

**Other considerations**

1. **Lodash library**: The `Lodash` library is a widely used utility belt that provides a collection of functions for various tasks, including string manipulation. In this benchmark, it's used to implement the `flow` function, which applies multiple functions in sequence.
2. **Flow function**: The `flow` function from Lodash takes multiple functions as arguments and applies them to the input data in sequence. This allows for a modular and reusable approach to complex transformations.

**Special JS feature or syntax**

There is no explicit mention of special JavaScript features or syntax in the benchmark definition. However, it's worth noting that some advanced JavaScript features like `async/await`, `promises`, or `generators` might be used in real-world implementations of these transformation functions.

**Alternatives**

Other alternatives to using Lodash for string transformations include:

1. **Native JavaScript methods**: Utilizing native JavaScript methods, such as `replace()`, `split()`, and `toUpperCase()`, can provide a more straightforward approach.
2. **Alternative libraries**: Other libraries like `string-promise` or `lodash-es` might offer similar functionality to Lodash for string transformations.

In summary, the benchmark definition JSON represents a comparison between two different approaches to implementing string transformations in JavaScript: a custom implementation (`transformOld`) and a library-based implementation (`transformNew`). The benchmark aims to evaluate the performance of these two options.

Related benchmarks:

titlepipemergedprefixremovalw (version: 0)

Comparing performance of: transformOld vs transformNew vs transformWithoutFlow

Created: 6 years ago by: Guest

Jump to the latest result

transformOld

transformNew

transformWithoutFlow

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):