Benchmark: ReplaceAll vs Replace with Regex on a Guid

Tests:

Regex
"b85168e9-40ca-4197-b903-fb07a4a94a38".replace(/-/g, "+");
Replace All
"b85168e9-40ca-4197-b903-fb07a4a94a38".replaceAll('-', "+");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Regex
Replace All

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Regex	8464967.0 Ops/sec
Replace All	7196858.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

**What is being tested?**

The provided benchmark measures the performance difference between two approaches to replace a hyphen (-) in a GUID (Globally Unique Identifier) string: using a regular expression (`/-/g` with `\+`) and using a `replaceAll()` method.

**Options compared:**

1. **Regular Expression (Regex)**: This approach uses a pattern to match the hyphen characters, which are then replaced with a plus sign (`\+`). The `/g` flag at the end of the pattern ensures that all occurrences are replaced, not just the first one.
2. **Replace All**: This approach uses the `replaceAll()` method, which is a built-in JavaScript function that replaces all occurrences of a specified value in a string.

**Pros and Cons:**

1. **Regular Expression (Regex)**:
	* Pros: Can handle more complex pattern matching, potentially faster for large strings.
	* Cons: May be slower due to the overhead of creating and executing the regex engine.
2. **Replace All**:
	* Pros: Typically faster, as it's a built-in function optimized for performance.
	* Cons: Limited to simple replacement patterns; may not handle more complex cases.

**Library usage:**

There is no library explicitly mentioned in the benchmark definition or test cases. However, the `replaceAll()` method is a part of the JavaScript standard library, so it relies on the language's built-in functionality.

**Special JS feature/syntax:**

None are mentioned in this specific benchmark. However, if you were to explore other benchmark tests, you might encounter features like:

* `let` and `const` declarations (for scoping and variable bindings)
* `async/await` for asynchronous programming
* `Symbol` properties for unique identifier generation
* etc.

**Other alternatives:**

If the benchmarker wanted to add more options, they could explore other approaches, such as:

1. **Using a custom function**: Implementing a custom function with string manipulation logic.
2. **Using a library like Lodash**: Which provides utility functions for string manipulation and replacement.
3. **Using a regex alternative**: Like the `replace()` method on an object or an array of characters.

Keep in mind that each approach would have its own trade-offs, performance characteristics, and potential pitfalls.

That's a summary of what's being tested in this benchmark!

Related benchmarks:

ReplaceAll vs Replace with Regex on a Guid (version: 0)

Comparing performance of: Regex vs Replace All

Created: 2 years ago by: Guest

Jump to the latest result

Regex

Replace All

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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