Benchmark: Regex whitespace remove vs trim

Script Preparation code:

var string = '    fsajdf asdfjosa fjoiawejf oawjfoei jaosdjfsdjfo sfjos 2324234 sdf safjao j o        sdlfks dflks l      '

Tests:

regex
string.replace(/\s/g, '')
trim
string.trim()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex
trim

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark is designed to compare two approaches for removing whitespace from a string:

1. `string.replace(/\\s/g, '')`
2. `string.trim()`

These are two common methods used in JavaScript to remove whitespace characters (spaces, tabs, newlines, etc.) from a string.

**Options Compared**

* `replace()` method using a regular expression to match and replace whitespace characters.
* `trim()` method, which removes whitespace from both the beginning and end of the string.

**Pros and Cons**

* **`replace()` method**:
	+ Pros: allows for more control over the types of whitespace characters removed (e.g., trimming specific characters like newlines).
	+ Cons: can be slower due to the overhead of compiling a regular expression, and may be less efficient if not optimized correctly.
* **`trim()` method**:
	+ Pros: faster and often more efficient since it's a built-in method optimized for performance.
	+ Cons: limited control over which whitespace characters are removed.

**Library/Features**

The benchmark uses the `replace()` method with a regular expression, which is a feature of JavaScript that allows for pattern matching and string manipulation. The `trim()` method is a built-in method in JavaScript.

**Special JS Feature or Syntax**

There's no special JavaScript feature or syntax being used in this benchmark. It's standard JavaScript code.

**Other Alternatives**

Other alternatives to remove whitespace from a string might include:

* Using a library like `lodash` with its `trimEnd()` and `trimStart()` methods.
* Implementing custom trimming logic using arithmetic operations (e.g., converting characters to ASCII values and subtracting 32 for spaces).
* Using a different approach, such as using a loop to iterate over the string characters.

Keep in mind that these alternatives might have varying degrees of performance impact, readability, and maintainability compared to the `replace()` and `trim()` methods.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/111.0

Browser/OS: Firefox 111 on Windows

View result in a separate tab

Test name	Executions per second
regex	1282544.0 Ops/sec
trim	41047972.0 Ops/sec

Related benchmarks:

Regex whitespace remove vs trim (version: 0)

Comparing performance of: regex vs trim

Created: one year ago by: Guest

Jump to the latest result

regex

trim

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):