Benchmark: Array vs Regex Titlize (but it's a fork)

Script Preparation code:

var text = 'Mary has a little lamb '.repeat(20);

Tests:

Split String
text.split(' ').map(w => `${w.charAt(0).toUpperCase()}${w.slice(1)}`).join(' ')
Regex
text.replace(/^(.)|\s+(.)/g, c => c.toUpperCase())

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Split String
Regex

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/81.0.4044.129 Safari/537.36

Browser/OS: Chrome 81 on Linux

View result in a separate tab

Test name	Executions per second
Split String	94777.9 Ops/sec
Regex	48585.3 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition and Purpose**

The provided benchmark, "Array vs Regex Titlize (but it's a fork)", tests two different approaches to titleizing a string: using the `split()` method with array manipulation, and using regular expressions. The purpose is to compare the performance of these two methods in titleizing a given string.

**Options Compared**

The two options compared are:

1. **Array Manipulation**: Using `split()`, `map()`, and `join()` to create a new string where each word is capitalized.
2. **Regular Expressions**: Using `replace()` with regular expressions to achieve the same result.

**Pros and Cons of Each Approach**

* **Array Manipulation**:
	+ Pros: Can be more predictable and easier to understand for those familiar with array operations.
	+ Cons: May be slower due to the overhead of creating and manipulating arrays.
* **Regular Expressions**:
	+ Pros: Can be faster and more concise, especially for complex pattern matching tasks.
	+ Cons: Requires knowledge of regular expression syntax and may be less predictable.

**Library Usage**

There is no explicit library usage mentioned in the benchmark definition. However, the `split()` method and `replace()` method are built-in JavaScript methods that can be used with or without additional libraries.

**Special JS Features/Syntax**

The benchmark uses some special features of JavaScript:

* **Template literals**: Used in the `"${w.charAt(0).toUpperCase()}${w.slice(1)}"` expression to create a new string by concatenating variables.
* **Regular expressions**: Used in the `replace()` method to match and replace patterns in the input string.

**Other Considerations**

The benchmark assumes that the input string is a simple sentence with multiple words, and the output should be a titleized version of the same string. The benchmark does not account for edge cases such as:

* Punctuation or special characters
* Numbers or dates
* Complex formatting requirements

**Alternatives**

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

* **Using `toUpperCase()` and concatenation**: Instead of using template literals, you could use the `toUpperCase()` method to uppercase each word individually.
* **Using `reduce()`**: You could use the `reduce()` method to accumulate the results of mapping each word to its titleized version.
* **Using a different string processing library**: Depending on your specific requirements, you might consider using a dedicated string processing library like UglifyJS or JSBeautifier.

Related benchmarks:

Array vs Regex Titlize (but it's a fork) (version: 0)

Titleize

Comparing performance of: Split String vs Regex

Created: 4 years ago by: Guest

Jump to the latest result

Split String

Regex

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):