Benchmark: Battle of strings

Script Preparation code:

var demoStr = 'This is a  demo of a  long string with  multiple spaces occasionally  added throughout  it.';

function regexReplace(str) {
  return str.replace(/\s+/g, ' ');
};

function arrayReplace(str) {
  let resultArr = [];
  const strArr = str.split(' ');
  for (let i = 0; i < strArr.length; i++) {
    if (strArr[i] != '') {
      resultArr.push(strArr[i]);
    }
  }
  return resultArr.join(' ');
};

function collapseSpaces(str) {
var out = ""
str.split(" ").forEach((c) => {
if (!!c) {
out += c + " "
}
})
return out.trim()
}

Tests:

regexReplace
regexReplace(demoStr)
arrayReplace
arrayReplace(demoStr)
collapseSpaces
collapseSpaces(demoStr)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regexReplace
arrayReplace
collapseSpaces

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36

Browser/OS: Chrome 60 on Mac OS X 10.12.6

View result in a separate tab

Test name	Executions per second
regexReplace	910718.4 Ops/sec
arrayReplace	1263750.5 Ops/sec
collapseSpaces	671585.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its test cases.

**Benchmark Definition JSON**

The benchmark definition defines three test cases: `regexReplace`, `arrayReplace`, and `collapseSpaces`. These test cases are used to measure the performance of different approaches for replacing spaces in a string.

**Options Compared**

The three test cases compare the following options:

1. **`regexReplace`**: This function uses regular expressions to replace one or more whitespace characters (`\\s+`) with a single space.
2. **`arrayReplace`**: This function splits the input string into an array, filters out empty strings, and then joins the remaining strings back together with a single space.
3. **`collapseSpaces`**: This function uses the `split()` method to split the input string into an array of words, iterates over the array, and appends each word followed by a space to a new string. Finally, it trims the trailing whitespace from the resulting string.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **`regexReplace`**:
	* Pros: Fast and efficient using regular expressions.
	* Cons: May not work as expected for certain edge cases (e.g., multiple consecutive whitespace characters).
2. **`arrayReplace`**:
	* Pros: Simple and easy to understand, but may be slower than the other two approaches.
	* Cons: Creates an array, which can lead to memory overhead.
3. **`collapseSpaces`**:
	* Pros: Easy to read and maintain, as it uses a simple loop.
	* Cons: May be slower than the other two approaches due to the loop.

**Library Usage**

None of the test cases use any external libraries.

**Special JS Features or Syntax**

The `regexReplace` function uses regular expressions, which is a JavaScript-specific feature. The `arrayReplace` and `collapseSpaces` functions do not use any special JavaScript features or syntax.

**Other Alternatives**

If you were to write similar benchmarks for replacing spaces in a string, you could also consider using other approaches, such as:

* Using the `trim()` method to remove leading and trailing whitespace.
* Using a string manipulation library like jQuery.
* Using a regular expression with the `g` flag to replace all occurrences of one or more whitespace characters.

Keep in mind that each approach has its own trade-offs in terms of performance, memory usage, and readability. The choice of approach depends on the specific requirements and constraints of your project.

Related benchmarks:

Battle of strings (version: 0)

Comparing performance of: regexReplace vs arrayReplace vs collapseSpaces

Created: 7 years ago by: Guest

Jump to the latest result

regexReplace

arrayReplace

collapseSpaces

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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