Benchmark: Capital with long name

Script Preparation code:

var strIn = "abcdefghijklmnopqrstuvwxyz";
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 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36

Browser/OS: Chrome 85 on Mac OS X 10.15.6

View result in a separate tab

Test name	Executions per second
Luke	910234.6 Ops/sec
Slice	3411640.0 Ops/sec
Danny	533824.6 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 JSON data and explain what is tested in the benchmark.

**Benchmark Definition**

The benchmark definition represents a JavaScript function that takes a string as input and returns the capitalized version of the string, excluding the first character if it's uppercase. The function uses the `split()`, `forEach()`, and `join()` methods to achieve this.

**Options Compared**

There are three options compared in the benchmark:

1. **Using `toUpperCase()`**: This option uses the `toUpperCase()` method to capitalize each substring of the input string, starting from the second character (`str_sub`).
2. **Using `charAt(0).toUpperCase() + str.slice(1)`**: This option uses the `charAt(0)` method to get the first character of the input string and converts it to uppercase using the `toUpperCase()` method, while ignoring the rest of the characters.
3. **Using a regular expression with `replace()`**: This option uses a regular expression to replace the first character of the input string with its uppercase equivalent.

**Pros and Cons**

Here are some pros and cons for each option:

* **Using `toUpperCase()`**:
	+ Pros: Simple, easy to read, and works well for most cases.
	+ Cons: Can be slower than other methods due to the overhead of method calls.
* **Using `charAt(0).toUpperCase() + str.slice(1)`**:
	+ Pros: More efficient than using `toUpperCase()` since it only needs to call two methods instead of one.
	+ Cons: May be less readable for developers not familiar with this syntax.
* **Using a regular expression with `replace()`**:
	+ Pros: Can be faster than other methods since regular expressions can take advantage of optimized engine code.
	+ Cons: May be more complex and harder to read, especially for those without experience with regular expressions.

**Library**

None of the provided benchmark definitions use any external libraries. However, it's worth noting that if you were to write a similar function in a production environment, you might consider using libraries like Lodash or Underscore.js to simplify the code and improve performance.

**Special JS Feature/Syntax**

There is no special JavaScript feature or syntax used in these benchmark definitions. They only use standard JavaScript features like `split()`, `forEach()`, `join()`, `charAt()`, and `toUpperCase()`.

**Alternatives**

If you're interested in exploring alternative approaches to this problem, here are some options:

1. **Using `String.prototype.toLocaleUpperCase()`**: This method can be used to capitalize the first character of each substring of the input string, starting from the second character.
2. **Using a single regular expression with `match()`, `map()`, and `join()`**: This approach can potentially be faster than using individual methods like `split()`, `forEach()`, and `join()`.

Related benchmarks:

Capital with long name (version: 0)

Comparing performance of: Luke vs Slice vs Danny

Created: 4 years ago by: Guest

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):