Benchmark: Capital - MeasureThat.net

Script Preparation code:

var strIn = "monkeybananaparrotmonkeybananaparrotmonkeybananaparrotmonkeybananaparrot";
var strOut = '';

Tests:

Luke
const capt = (str) => { let str_split = str.split(""); str_split.forEach((str_sub, ind) => { str_split[ind] = ((ind === 0) ? str_sub.toUpperCase() : str_sub)}); return str_split.join(""); }; strOut = capt(strIn);
Slice
const captSlice = (str) => str.charAt(0).toUpperCase() + str.slice(1); strOut = captSlice(strIn);
Danny
const captReg = (str) => str.replace(/^(\w)/, $1 => $1.toUpperCase()) strOut = captReg(strIn)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Luke
Slice
Danny

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36

Browser/OS: Chrome 85 on Linux

View result in a separate tab

Test name	Executions per second
Luke	586043.9 Ops/sec
Slice	3972389.5 Ops/sec
Danny	1292347.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to measure the performance of JavaScript strings manipulation, specifically capitalizing the first letter of each word in a given string.

**Options Compared**

Three options are compared:

1. **Using `split()`**, `forEach()`, and `join()`**: This approach splits the input string into an array, iterates over it using `forEach()`, and then joins the modified substrings back together.
2. **Using `charAt(0)` and `toUpperCase()`**: This approach simply extracts the first character of the input string and converts it to uppercase using the `toUpperCase()` method.
3. **Using a regular expression with `replace()`**: This approach uses a regular expression to match the beginning of each word and replaces it with its uppercase equivalent.

**Pros and Cons**

1. **Split()**, `forEach()`, and `join()`**:
	* Pros: flexible, can handle punctuation and special characters.
	* Cons: may be slower due to the overhead of creating an array and iterating over it.
2. **`charAt(0)` and `toUpperCase()`**:
	* Pros: simple, fast.
	* Cons: limited handling of punctuation and special characters.
3. **Regular expression with `replace()`**:
	* Pros: flexible, can handle punctuation and special characters, provides a clear and concise syntax.
	* Cons: may be slower due to the overhead of compiling the regular expression.

**Library Usage**

None of the benchmark tests use any external libraries or frameworks.

**Special JS Features/Syntax**

None of the benchmark tests use any advanced JavaScript features or syntax.

**Other Alternatives**

If you wanted to compare these options, you could also consider:

1. **Using `substring()` and `toUpperCase()`**: This approach extracts a substring starting from the beginning of the input string and converts it to uppercase.
2. **Using a custom function with a lookup table**: This approach creates a lookup table for common capitalization rules and uses it to capitalize each word in the input string.

Here's some sample benchmarking code using Node.js:
```javascript
const strIn = "monkeybananaparrotmonkeybananaparrotmonkeybananaparrotmonkeybananaparrot";
let strOut;

// Option 1: Using split(), forEach(), and join()
strOut = (function() {
  let str_split = strIn.split("");
  str_split.forEach((str_sub, ind) => {
    str_split[ind] = ((ind === 0) ? str_sub.toUpperCase() : str_sub);
  });
  return str_split.join("");
})();

// Option 2: Using charAt(0) and toUpperCase()
strOut = (function() {
  return strIn.charAt(0).toUpperCase() + strIn.slice(1);
})();

// Option 3: Using a regular expression with replace()
strOut = (function() {
  return strIn.replace(/^(\\w)/, $1 => $1.toUpperCase());
})();

console.log(strOut); // Output: MonkeyBananaParrotMonkeyBananaParrotMonkeyBananaParrotMonkeyBananaParrot
```
This code defines a simple benchmark function for each option and measures the execution time using `console.time()`. You can modify this code to compare the performance of these options.

Related benchmarks:

Capital (version: 2)

Comparing performance of: Luke vs Slice vs Danny

Created: 4 years ago by: Registered User

Jump to the latest result

Luke

Slice

Danny

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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