Benchmark: sillyString 2 - MeasureThat.net

Tests:

slice
const word = "Hello World"; const vowels = 'aeiou'; let newWord = ''; word.split('').forEach((index, i ) => { if (vowels.includes(word[i])) { newWord += word.slice(i, i+1) + 'b' + word[i]; } else { newWord += word.slice(i, i+1); } }); return newWord;
regex
const word = "Hello World"; return word.replace(/[aeiou]/gi, (match) => match + 'b' + match);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
regex

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 world of JavaScript microbenchmarks on MeasureThat.net!

The provided JSON represents two benchmark definitions:

**Benchmark Definition**

* `Name`: "sillyString 2" (a descriptive name for the benchmark)
* `Description`: null (no description is provided)
* `Script Preparation Code` and `Html Preparation Code`: both are empty, indicating that no specific code needs to be run before or after the test

The two individual test cases are:

**Test Case 1: "slice"`

* The benchmark definition is a JavaScript function that takes no arguments:
```javascript
const word = "Hello World";
const vowels = 'aeiou';
let newWord = '';

word.split('').forEach((index, i) => {
  if (vowels.includes(word[i])) {
    newWord += word.slice(i, i+1) + 'b' + word[i];
  } else {
    newWord += word.slice(i, i+1);
  }
});

return newWord;
```
This function splits the input string "Hello World" into individual characters and checks if each character is a vowel. If it is, the corresponding vowel from the vowels string is appended to `newWord`, followed by the original character, an 'b', and the vowel. If not, only the original character is appended.

**Test Case 2: "regex"`

* The benchmark definition is another JavaScript function that takes no arguments:
```javascript
const word = "Hello World";
return word.replace(/[aeiou]/gi, (match) => match + 'b' + match);
```
This function uses a regular expression to replace each vowel in the input string with the original character followed by an 'b'.

Now, let's discuss the options compared:

**Option 1: Using `split()` and iteration**

* This approach uses the `split()` method to split the input string into individual characters, iterating over them using the `forEach` method.
* Pros:
	+ Can handle non-string inputs (e.g., arrays or objects) by using a string conversion function
	+ Allows for more control over the iteration process (e.g., using a different iterator)
* Cons:
	+ Can be slower due to the creation of an array and the overhead of iteration
	+ May not work correctly with certain types of input data (e.g., non-ASCII characters)

**Option 2: Using regular expressions**

* This approach uses a single `replace()` method call with a regular expression to replace each vowel in the input string.
* Pros:
	+ Can be faster due to the optimized regex engine
	+ Often more concise and readable than the iteration-based approach
* Cons:
	+ May not work correctly with certain types of input data (e.g., non-ASCII characters)
	+ Limited control over the replacement process

The provided benchmark results show:

* For "regex", Chrome 114 on Desktop (Windows) has an average execution rate of 1,882,876 executions per second.
* For "slice", Chrome 114 on Desktop (Windows) has an average execution rate of 2,058,233 executions per second.

Other considerations:

* The use of `includes()` and the regex engine's optimization may affect performance for certain types of input data.
* The choice between iteration-based and regex-based approaches depends on personal preference, code readability, and specific requirements.

Alternatives to these benchmarks could include:

* Using different programming languages (e.g., Python, Java) or environments (e.g., Node.js, Rust)
* Examining the performance of different JavaScript engines (e.g., V8, SpiderMonkey)
* Investigating the impact of various optimization techniques on performance (e.g., caching, memoization)
* Comparing the performance of microbenchmarks with more complex, real-world scenarios

Related benchmarks:

sillyString 2 (version: 0)

Comparing performance of: slice vs regex

Created: 2 years ago by: Guest

Jump to the latest result

slice

regex

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):