Benchmark: Trim All Whitespace

Script Preparation code:

str = ' a b    c d e   f g   ';

Tests:

Replace Regex
str.replace(/\s/g,' ')
Split & Join
str.split(" ").join(" ");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Replace Regex
Split & Join

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

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Let's break down the provided JSON data to understand what's being tested and compared.

**Benchmark Definition**

The benchmark is called "Trim All Whitespace" with no description. The preparation code initializes a string `str` with some whitespace characters: `' a b    c d e   f g   ';`.

**Test Cases**

There are two individual test cases:

1. **Replace Regex**: This test case uses the `replace()` method with a regular expression (`/\s/g`) to remove all whitespace characters from the string `str`. The benchmark definition is `str.replace(/\\s/g,' ')`.
2. **Split & Join**: This test case splits the string `str` into an array using the space character as a delimiter (`" "`) and then joins it back together with spaces in between. The benchmark definition is `str.split(\" \").join(\" \");`.

**Latest Benchmark Results**

The latest results show two browsers running these test cases:

1. **Split & Join**: Chrome 108 on Windows, Desktop, executing 1,763,705 operations per second.
2. **Replace Regex**: Chrome 108 on Windows, Desktop, executing 1,341,968.375 operations per second.

**What's being compared?**

The two test cases compare different approaches to removing whitespace characters from a string:

* **Replace Regex**: Using the `replace()` method with a regular expression (`/\s/g`) is the most straightforward approach.
* **Split & Join**: Splitting the string into an array using spaces as delimiters and then joining it back together is a more verbose approach.

**Pros and Cons of each approach**

1. **Replace Regex**:
	* Pros: Simple, efficient, and easy to read.
	* Cons: May not work as expected if the input string contains non-standard whitespace characters (e.g., Unicode whitespace).
2. **Split & Join**:
	* Pros: More robust against non-standard whitespace characters.
	* Cons: More verbose code, potentially slower performance due to additional array operations.

**Other considerations**

1. **Library usage**: None mentioned in this specific benchmark definition.
2. **Special JS features or syntax**: None used in these test cases.
3. **Alternative approaches**: Other ways to remove whitespace from a string include using the `trim()` method, regular expressions with `RegExp.prototype.test()`, or even manual iteration through the string characters.

In summary, the "Trim All Whitespace" benchmark compares two different approaches to removing whitespace characters from a string: using the `replace()` method with a regular expression and splitting/joining the string. The results show that the `Replace Regex` approach is faster on this specific test case.

Related benchmarks:

Trim All Whitespace (version: 0)

Comparing performance of: Replace Regex vs Split & Join

Created: 3 years ago by: Guest

Jump to the latest result

Replace Regex

Split & Join

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):