Benchmark: replaceAll vs regex replace pt3

Tests:

replace regex
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.".replace(/ /g, "+");
replace All
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.".replaceAll(" ", "+");
split & join
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.".split(" ").join("+");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replace regex
replace All
split & join

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3.1 Safari/605.1.15

Browser/OS: Safari 17 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
replace regex	181849536.0 Ops/sec
replace All	265240.3 Ops/sec
split & join	395741.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Measuring the performance of different string manipulation approaches is crucial for optimizing JavaScript code.

The provided benchmark measures three common methods to replace or manipulate strings:

1. **Regex Replace**: This method uses regular expressions to search and replace specific patterns in the string. The `/ /g` pattern matches one or more whitespace characters, and `+` is used as a replacement character.
2. **Replace All**: This method uses the built-in `replaceAll()` function to replace all occurrences of a specified pattern with a new value. In this case, it replaces all whitespace characters with `+`.
3. **Split & Join**: This method splits the string into an array using a separator (in this case, whitespace), joins the array elements back into a string with a different separator (`+`).

**Pros and Cons of each approach:**

1. **Regex Replace**:
	* Pros:
		+ Can handle complex patterns and replacements.
		+ More flexible than other methods.
	* Cons:
		+ Slower due to the overhead of regular expression processing.
		+ Can be less efficient for simple string manipulation tasks.
2. **Replace All**:
	* Pros:
		+ Fast and efficient, as it uses a built-in function optimized for performance.
		+ Simple and easy to use.
	* Cons:
		+ Limited flexibility compared to Regex Replace.
		+ May not work well with complex patterns or edge cases.
3. **Split & Join**:
	* Pros:
		+ Fast and efficient, as it uses built-in string methods optimized for performance.
		+ Simple and easy to use.
	* Cons:
		+ Only suitable for simple splitting and joining tasks.
		+ May not work well with complex patterns or edge cases.

**Library usage:**

None of the provided benchmark tests explicitly use any external libraries. However, some browsers may include additional libraries or APIs that can affect performance, such as Safari's `String.prototype.replaceAll()` method, which is an implementation of the regular expression replace functionality.

**Special JS features or syntax:**

* None mentioned in the provided examples.
* If you'd like to explore other approaches, consider using the `String.prototype.replace()` and `String.prototype.split()` methods, which are built into the JavaScript standard library.

Related benchmarks:

replaceAll vs regex replace pt3 (version: 0)

Comparing performance of: replace regex vs replace All vs split & join

Created: 10 months ago by: Guest

Jump to the latest result

replace regex

replace All

split & join

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):