Benchmark: Pattern Match Methods

Script Preparation code:

window.testUris = Array(10000).fill().map(() => `/i18n/${(Math.random > 0.5) ? 'creation' : 'material'}/${Math.random()}`);

Tests:

Regex
const pattern = /\/i18n\/material\/.*/; const result1 = window.testUris.map(uri => pattern.test(uri));
Includes
const pattern = '/i18n/material/'; const result2 = window.testUris.map(uri => uri.includes(pattern));
substring Equal
const pattern = '/i18n/material/'; const result2 = window.testUris.map(uri => uri.substring(0, pattern.length) === pattern);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Regex
Includes
substring Equal

Fastest: N/A

Slowest: N/A

Latest run results:

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

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**Benchmark Overview**

The provided benchmark measures the performance of three different pattern matching methods in JavaScript: `Regex`, `Includes`, and `substring Equal`. The test cases use an array of URLs generated by the script preparation code, which creates an array of 10,000 unique URLs with varying patterns.

**Options Compared**

1. **Regex**: This method uses a regular expression to match the URL patterns.
2. **Includes**: This method checks if the URL includes the target pattern using the `includes()` method.
3. **substring Equal**: This method compares the first substring of the URL with the target pattern using the `substring()` method.

**Pros and Cons of Each Approach**

1. **Regex**:
	* Pros: Provides a high degree of accuracy, can handle complex patterns, and is generally fast.
	* Cons: Can be slower than other methods due to the overhead of compiling regular expressions.
2. **Includes**:
	* Pros: Fast and simple, doesn't require compilation or parsing like regex.
	* Cons: May not provide accurate results if the target pattern is not found at the beginning of the URL, and can lead to false positives.
3. **substring Equal**:
	* Pros: Simple and fast, but may be slower than regex for large inputs due to string comparison overhead.
	* Cons: Limited accuracy, as it only checks the first substring of the URL.

**Library Used**

None explicitly mentioned in the benchmark definition or test cases. However, the use of `window.testUris` suggests that this is a custom array created by the script preparation code.

**Special JS Feature/Syntax**

The benchmark uses JavaScript features such as:

1. **Arrow functions**: Used in the script preparation code to create an array of URLs.
2. **Template literals**: Used in the script preparation code to generate the URL patterns.
3. **String interpolation**: Used in the script preparation code to insert variables into the URL patterns.

**Other Considerations**

* The benchmark uses a small number of test cases (3) and a relatively small input size (10,000 URLs). In practice, this may not be representative of real-world performance scenarios.
* The benchmark does not account for browser-specific optimizations or differences in how browsers handle regular expressions.
* The results are based on a single user agent string, which may not be representative of all users.

**Alternatives**

Some alternative pattern matching methods that could be used instead of the ones tested here include:

1. **String.prototype.startsWith()**: A method that checks if a string starts with a specified value.
2. **String.prototype.endsWith()**: A method that checks if a string ends with a specified value.
3. **Using a third-party library**: Libraries like Lodash or Ramda provide more advanced pattern matching functionality, such as support for complex regular expressions and fuzzy matching.

In conclusion, the benchmark provides a simple way to compare the performance of different pattern matching methods in JavaScript. However, it is essential to consider the limitations and potential biases of the benchmark when interpreting the results.

Related benchmarks:

Pattern Match Methods (version: 0)

Comparing performance of: Regex vs Includes vs substring Equal

Created: 3 years ago by: Guest

Jump to the latest result

Regex

Includes

substring Equal

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):