Benchmark: UUID Regex with group and without

Script Preparation code:

var string = "559B13D8-274B-1DEB-0728-5C6EB15309F5";
var regex = /[A-Z0-9]{8}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{12}/;
var groupRegex = /[A-Z0-9]{8}-([A-Z0-9]{4}-){3}-[A-Z0-9]{12}/;

Tests:

RegEx.test
regex.test(string);
String.includes
groupRegex.test(string);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
RegEx.test
String.includes

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is a crucial task, and MeasureThat.net provides a great platform for benchmarking microbenchmarks. Let's dive into the explanation of what's being tested in this specific benchmark.

**Overview**

The provided JSON represents two test cases:

1. `UUID Regex with group and without`: This test case compares the performance of regular expression (regex) testing on two different regex patterns:
	* The first pattern, `groupRegex`, matches a UUID (Universally Unique Identifier) string by extracting the groups using parentheses (`([A-Z0-9]{8}-){3}-[A-Z0-9]{12}`).
	* The second pattern, `regex`, is a simple UUID regex without capturing groups.
2. `RegEx.test` and `String.includes`: These are two test cases that compare the performance of JavaScript's built-in `test()` method for regular expressions with the `includes()` method.

**Options Compared**

In each test case, there are two options being compared:

* For the UUID regex patterns:
	+ `groupRegex`: Extracts groups from the string using parentheses.
	+ `regex`: Does not extract groups.
* For `RegEx.test` and `String.includes`:
	+ `test()` method: A built-in JavaScript method for testing a regular expression.
	+ `includes()`: A built-in JavaScript method for checking if a substring is present in another string.

**Pros and Cons of Each Approach**

1. **UUID Regex Patterns**
	* `groupRegex`:
		+ Pros:
			- Can extract relevant parts of the UUID (e.g., version, timestamp).
			- May be faster due to reduced regex complexity.
		- Cons:
			- May introduce additional overhead from extracting groups.
	* `regex`:
		+ Pros:
			- Simpler regex pattern with fewer captures.
			- May be faster due to reduced regex complexity.
		- Cons:
			- Does not extract relevant parts of the UUID.
2. **RegEx.test() vs String.includes()**
	* `test()` method:
		+ Pros:
			- Built-in JavaScript method, potentially optimized for performance.
			- Supports more features (e.g., flags, capturing groups).
		- Cons:
			- May not be as fast due to additional overhead from method invocation.
	* `includes()`: This is not a built-in JavaScript method; it's likely an external library function or a custom implementation. If it's not optimized for performance, it may be slower than `test()`.

**Library and Syntax Considerations**

For the `String.includes()` test case, it seems that this function is not native to JavaScript. MeasureThat.net might use an external library (e.g., jQuery) or a custom implementation for this functionality.

If you're using JavaScript 14 or later, you can take advantage of pattern matching with `test()` and capturing groups with parentheses (`(`...`)`).

**Other Considerations**

When benchmarking performance-critical code like regex testing, it's essential to consider factors such as:

* Data size: Larger input data may affect performance.
* System resources: CPU, memory, and disk I/O usage can impact results.
* Optimizations: Using techniques like caching or memoization can improve performance.

**Alternatives**

If you want to explore alternative approaches for benchmarking regex testing, consider the following options:

1. Use a different regex library or implementation (e.g., `regex- escape`).
2. Test with different types of input data (e.g., numbers, dates, strings).
3. Experiment with caching or memoization techniques.
4. Investigate browser-specific optimizations for performance-critical code.

Keep in mind that the best approach depends on your specific use case and requirements.

Related benchmarks:

UUID Regex with group and without (version: 0)

Comparing performance of: RegEx.test vs String.includes

Created: 3 years ago by: Guest

Jump to the latest result

RegEx.test

String.includes

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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