Benchmark: pageid regex vs indexOf

Tests:

indexOf
let placeholders = [ 'country_adwad', 'country_adwad?adwas=true', 'country_adwad#anchor', 'country_adwad?adwas=true#anchor' ]; placeholders.forEach((placeholder) => { var placeholderLength = placeholder.length; var endPageId = placeholder.indexOf('?') !== -1 ? placeholder.indexOf('?') : placeholder.indexOf('#') !== -1 ? placeholder.indexOf('#') : placeholderLength; console.log(placeholder.substring(0, endPageId), placeholder.substring(endPageId, placeholderLength)); });
regex
let placeholders = [ 'country_adwad', 'country_adwad?adwas=true', 'country_adwad#anchor', 'country_adwad?adwas=true#anchor' ]; placeholders.forEach((item) => { const regexp = /^([a-zA-Z-_]+)[?#]?(.*)?/; let match = item.match(regexp); let pageID = match[1]; let queryString = match[2]; console.log(pageID, queryString); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
indexOf
regex

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

I'll break down the benchmark and explain what's being tested, compared, and its pros/cons.

**Benchmark Overview**

The benchmark compares two approaches to extract page IDs from a list of strings:

1. **indexOf**: Using the `indexOf()` method to find the index of the first occurrence of `'?'` or `'#'` in each string.
2. **regex**: Using regular expressions (regex) to match the pattern `[a-zA-Z-_]+(?#[?#]?)(.*)?`, which captures the page ID and query string.

**Options Compared**

The benchmark compares the performance of these two approaches:

* **indexOf**: A simple, built-in method for finding the index of a substring.
* **regex**: A more complex approach using regular expressions to match the pattern.

**Pros/Cons of Each Approach**

**indexOf:**

Pros:

* Fast and efficient, as it's implemented in native code.
* Easy to use and understand.

Cons:

* Limited flexibility, as it only searches for specific substrings (`'?`` or `'#'`) at a time.
* May not work correctly if the input strings contain these characters in unexpected ways (e.g., escaped characters).

**regex:**

Pros:

* Highly flexible and powerful, allowing for complex pattern matching.
* Can handle various edge cases and input formats.

Cons:

* Slower than `indexOf` due to the overhead of compiling and executing regex patterns.
* More difficult to understand and use, especially for beginners or those without regex experience.

**Library Used**

In this benchmark, the library used is not explicitly mentioned. However, assuming it's a JavaScript engine (e.g., V8), the regex pattern `[a-zA-Z-_]+(?#[?#]?)(.*)?` is likely defined using the `RegExp` constructor or a similar API.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax used in this benchmark. The code only relies on built-in methods and regular expressions, making it accessible to most software engineers with basic JavaScript knowledge.

**Other Alternatives**

Alternative approaches to extract page IDs could include:

* Using string manipulation functions like `split()` or `replace()`.
* Employing natural language processing (NLP) techniques to identify patterns in the input strings.
* Leveraging machine learning algorithms to classify input strings as containing a page ID or not.

However, these alternatives might not be as efficient or flexible as the regex approach used in this benchmark.

Related benchmarks:

pageid regex vs indexOf (version: 0)

Comparing performance of: indexOf vs regex

Created: 2 years ago by: Guest

Jump to the latest result

indexOf

regex

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):