Benchmark: Split vs Regex but with URLs

Script Preparation code:

var testString = "test|https://www.cnn.com/2025/04/12/tech/trump-electronics-china-tariffs/index.html?iid=cnn_buildContentRecirc_end_recirc#openweb-convo|0-1,5-6,99-10101"

Tests:

Splitting
var values = testString.split("|"); var value1 = values[0]; var value2 = values[1]; var value3 = values[2];
Regex
var regex = '(.*?)\|(.*?)\|(.*)' var value1 = regex[0]; var value2 = regex[1]; var value3 = regex[2];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Splitting
Regex

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Splitting	39404960.0 Ops/sec
Regex	158853504.0 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated one year ago):

LLMs can make mistakes. Check important info.

The benchmark you provided is titled "Split vs Regex but with URLs" and it tests the performance of two different methods for processing a string: splitting the string by a delimiter and using a regular expression to extract parts of the string.

### Comparison of Approaches

1. **Splitting**:
   - **Code**:
     ```javascript
     var values = testString.split("|");
     var value1 = values[0];
     var value2 = values[1];
     var value3 = values[2];
     ```
   - **Description**: This method uses the `split()` function, which takes a delimiter (in this case, the pipe character "|") and divides the string into an array of substrings.
   - **Pros**:
     - **Simplicity**: The `split()` function is straightforward and easy to understand.
     - **Performance**: Often faster than regex for basic splitting tasks due to lower overhead.
   - **Cons**:
     - **Inflexibility**: Limited to splitting on a single character or a simple string and cannot accommodate more complex parsing needs.
   - **Use Cases**: Ideal when you need to partition a string using a known delimiter and when the format of the string is consistent.

2. **Regex**:
   - **Code**:
     ```javascript
     var regex = '(.*?)\\|(.*?)\\|(.*)';
     var value1 = regex[0];
     var value2 = regex[1];
     var value3 = regex[2];
     ```
   - **Description**: This code (though not properly using a regex implementation here) suggests using a regular expression to match patterns in the string.
   - **Pros**:
     - **Flexibility**: Regular expressions can match complex patterns, making them more powerful for parsing strings with varying formats.
     - **Comprehensiveness**: Can extract more than just parts of a string based on various criteria.
   - **Cons**:
     - **Complexity**: Regex can be difficult to read and write, especially for those not familiar with regex syntax.
     - **Performance**: Typically slower than splitting for simple tasks due to the overhead of regex parsing.
   - **Use Cases**: Best suited for cases where the structure of the input data is not strictly defined or needs more complex conditions to extract parts.

### Benchmark Results

The benchmark results indicate that the `Regex` approach achieved **746,145,856 executions per second**, while the `Splitting` method recorded **4,993,935 executions per second**. This data shows that the regex method significantly outperformed the split method in this particular experiment.

### Other Considerations

- **Readability vs. Performance**: While the regex method is faster in this benchmark, in many real-world cases, developers may prefer readability and maintainability over minor performance gains, especially if the input format is stable and consistent.
- **Complex Input**: For more complicated scenarios (e.g., strings with irregular delimiters, nested structures), regex might be necessary. Conversely, if you are guaranteed a clean input format, using `split()` can enhance code clarity.
- **Alternatives**: Other alternatives for string manipulation could include using string libraries or utilities such as `String.prototype.slice()` for extraction without splitting, or other functional programming patterns depending on the use case.

In summary, this benchmark compares two different approaches to string manipulation—simpler direct splitting versus more complex regex pattern matching. The choice between them will largely depend on specific use cases and the need for performance or clarity in your application.

Related benchmarks:

Split vs Regex but with URLs (version: 1)

Comparing performance of: Splitting vs Regex

Created: one year ago by: Guest

Jump to the latest result

Splitting

Regex

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated one year ago):