Benchmark: bench simple split vs replace regex

Script Preparation code:

var authorization = 'bearer 1234567890'

Tests:

simple split
const token = authorization?.split(' ')[1] ?? '';
replace regex
const token = authorization.replace(/^bearer\s+/i, '');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
simple split
replace regex

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser/OS: Chrome 112 on Linux

View result in a separate tab

Test name	Executions per second
simple split	8910601.0 Ops/sec
replace regex	11062109.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in this benchmark.

**Benchmark Definition**

The provided JSON represents a JavaScript microbenchmark, specifically designed to compare two approaches for extracting the token from an authorization string: simple split and regular expression replacement.

**Options Compared**

Two options are compared:

1. **Simple Split**: This approach uses the `split()` method to divide the authorization string into parts separated by spaces. The token is then extracted as the second part (`authorization?.split(' ')[1] ?? '';`).
2. **Regular Expression Replacement**: This approach uses a regular expression to replace the prefix "bearer " with an empty string, effectively removing it from the authorization string. The resulting string contains only the token.

**Pros and Cons**

Here's a brief analysis of each approach:

* **Simple Split**:
	+ Pros: Simple, easy to understand, and widely supported by most JavaScript engines.
	+ Cons: May not work correctly with non-space separated tokens or edge cases like multiple spaces between the prefix and the token.
* **Regular Expression Replacement**:
	+ Pros: More robust and flexible, as it can handle different prefix formats and edge cases. However, regular expression engines might be slower than simple string manipulation.
	+ Cons: May be less intuitive for some developers, and its performance might vary depending on the specific regex implementation.

**Library Usage**

None of the test code explicitly uses a JavaScript library, but the `authorization` variable is assigned a value using string interpolation (`"var authorization = 'bearer 1234567890'";`). This syntax is supported by most modern JavaScript engines without any external libraries.

**Special JS Features or Syntax**

There's no special JavaScript feature or syntax used in this benchmark. The code relies on standard JavaScript language features, such as string manipulation and regular expressions.

**Other Alternatives**

If you need to compare other approaches for extracting tokens from authorization strings, consider these alternatives:

* Using a dedicated library like `axios` or `fetch`, which provide built-in support for token extraction.
* Employing alternative parsing techniques, such as using `String.prototype.replace()` with multiple replace operations or leveraging a dedicated library like `parse-authorization`.
* Investigating more advanced approaches, like machine learning-based token recognition or using WebAssembly-based libraries for optimized performance.

These alternatives might be necessary depending on the specific requirements of your project or the complexity of the tokens to be extracted.

Related benchmarks:

bench simple split vs replace regex (version: 0)

Comparing performance of: simple split vs replace regex

Created: one year ago by: Registered User

Jump to the latest result

simple split

replace regex

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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