Benchmark: Try js bench Rplace vs ReplaceAll

Tests:

replaceAll
"this is the new shit".replaceAll(' ', '-')
regex
"this is the new shit".replace(new RegExp(' ', 'g'), '-')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replaceAll
regex

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36

Browser/OS: Chrome 113 on Windows

View result in a separate tab

Test name	Executions per second
replaceAll	6248138.5 Ops/sec
regex	3153949.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and explain what's being tested, the options compared, pros and cons of each approach, and other considerations.

**Benchmark Definition**

The benchmark is designed to compare two string replacement approaches: `replaceAll` and regular expressions (`regex`). The test case uses a JavaScript script that defines a string `"this is the new shit"` and attempts to replace whitespace characters with a hyphen using both methods.

**Options Compared**

1. **`replaceAll`**: This method uses the `replace()` function, which takes two arguments: the substring to be replaced (whitespace) and the replacement value (-). The `g` flag at the end of the regular expression indicates that all occurrences should be replaced.
2. **Regular Expressions (`regex`)**: This method uses a regular expression with a `RegExp` object to replace whitespace characters with a hyphen.

**Pros and Cons**

1. **`replaceAll`**:
	* Pros: Simple, easy to read, and understood by most developers.
	* Cons: May be slower than the regex approach due to its simpler logic.
2. **Regular Expressions (`regex`)**:
	* Pros: Can handle more complex replacement scenarios (e.g., matching escaped whitespace) and is often faster than `replaceAll`.
	* Cons: More complex, harder to read, and may require additional overhead due to regular expression creation.

**Other Considerations**

* The benchmark measures the number of executions per second, which provides insight into the performance difference between these two approaches.
* It's worth noting that both methods have their use cases in JavaScript. `replaceAll` is often used for simple string replacement tasks, while regex is commonly employed for more complex string manipulation and pattern matching.

**Library/Extension Used**

In this benchmark, no external libraries or extensions are mentioned. The comparison is solely between the two built-in JavaScript methods: `replaceAll` and regular expressions (`regex`).

No special JavaScript features or syntax are used in this benchmark.

**Alternatives**

Other alternatives to `replaceAll` might include:

* Using a library like Lodash's `str.replace()` method
* Employing a string manipulation function from another language (e.g., C++'s `std::string::replace()`)
* Utilizing a third-party JavaScript library for more complex text processing tasks

Keep in mind that this benchmark focuses specifically on comparing the performance of `replaceAll` and regular expressions (`regex`) within JavaScript, so other alternatives are not directly relevant to the comparison at hand.

Related benchmarks:

Try js bench Rplace vs ReplaceAll (version: 0)

Comparing performance of: replaceAll vs regex

Created: one year ago by: Guest

Jump to the latest result

replaceAll

regex

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):