Benchmark: url testing - MeasureThat.net

Script Preparation code:

var url = 'https://yandex.ru/search/touch/?lr=213&lite=1&noredirect=1&text=%D0%BA%D0%BE%D1%82%D0%B8%D0%BA%D0%B8&suggest_reqid=55015255567175453466026592384166';

Tests:

regex
var parser = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@\/]*)(?::([^:@\/]*))?)?@)?(\[[0-9a-fA-F:.]+\]|[^:\/?#]*)(?::(\d+|(?=:)))?:?)((((?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/, // eslint-disable-line parserKeys = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'], m = parser.exec(url || ''), parts = {}; parserKeys.forEach(function(key, i) { parts[key] = m[i] || ''; });
url
var u = new URL(url);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex
url

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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Let's break down the provided benchmark and its various components.

**Benchmark Definition**

The benchmark definition is represented by two JSON objects: one for the overall benchmark and another for each individual test case.

**Overall Benchmark**

The overall benchmark is defined as follows:

* `Name`: "url testing"
* `Description`: None
* `Script Preparation Code`: This code sets a URL variable to a specific Yandex search page link.
* `Html Preparation Code`: None (meaning no HTML code is prepared)

This overall benchmark defines the scope of the entire test suite, which is focused on testing two different approaches for parsing URLs: regular expressions and the built-in `URL` API.

**Individual Test Cases**

There are two individual test cases:

1. **"regex"`**
	* This test case uses a regular expression to parse the URL.
	* The benchmark definition includes:
		+ A comment with an ESLint disable directive, which is used by modern JavaScript linters to ignore certain rules related to the use of this regex pattern.
		+ An object `parserKeys` that defines the keys expected from the parsed URL. These keys include:
			- source
			- protocol
			- authority
			- userInfo
			- user
			- password
			- host
			- port
			- relative
			- path
			- directory
			- file
			- query
			- anchor
		+ A call to the `parser.exec()` function, which executes the regular expression on the prepared URL. The result is stored in the variable `m`.
		+ An object `parts` that iterates over the `parserKeys`, populating it with values from the parsed URL using the corresponding index (`i`) from the `m` array.
2. **"url"`**
	* This test case uses the built-in `URL` API to parse the URL.
	* The benchmark definition includes:
		+ A call to the `URL()` constructor, which creates a new `URL` object from the prepared URL.
		+ A variable `u` that holds the result of this construction.

**Options Compared**

The two test cases compare two different approaches for parsing URLs:

1. **Regular Expressions (regex)**:
	* Pros:
		+ Flexibility, as regular expressions can handle a wide range of URL formats.
		+ Can be used to parse other types of data that don't fit the standard URL format.
	* Cons:
		+ Complexity, as regular expressions require expertise in writing them correctly.
		+ Performance overhead due to the complexity and overhead of compiling and executing the regex pattern.
2. **Built-in `URL` API**:
	* Pros:
		+ Performance, as it's a native JavaScript API optimized for parsing URLs.
		+ Simplicity, as it provides a straightforward and easy-to-use interface for parsing URLs.

**Libraries Used**

None are explicitly mentioned in the benchmark definition. However, the `URL` API is a built-in JavaScript library that is widely supported across different browsers and environments.

**Special JS Features or Syntax**

The regular expression used in the "regex" test case uses some advanced syntax features:

* The `(?! ...)` negative lookahead assertion.
* The `(?: ...)` non-capturing group.

These features are not specific to the `URL` API, but rather a part of the JavaScript language itself.

Related benchmarks:

url testing (version: 0)

Comparing performance of: regex vs url

Created: 7 years ago by: Guest

Jump to the latest result

regex

url

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):