Benchmark: Ga cookie grabber

Script Preparation code:

var cookie = "_ga=GA1.1.12345678.87654321"

Tests:

Split
cookie.split("_ga=")[1].split(";")[0].split(".").splice(2).join('.')
Regex
('; ' + cookie).split('; _ga=').pop().split(';').shift().match(/GA1\.[0-9]{1}\.(.+)/)[1]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Split
Regex

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark, named "Ga cookie grabber", measures the performance of two specific operations on a string variable `cookie` that contains the Google Analytics tracking code `_ga=GA1.1.12345678.87654321`. The goal is to extract and manipulate this tracking code.

**Test Cases**

There are two test cases:

### 1. "Split"

This test case measures the performance of splitting the `cookie` string at specific indices.

* The benchmark definition is: `cookie.split(" _ga=")[1].split(";").splice(2).join('.')`
	+ This code splits the `cookie` string at the substring "_ga=".
	+ It then takes the second element of the resulting array (index 1).
	+ This element contains the tracking code without the "_ga=" prefix.
	+ The code removes the last two characters from this string using `splice(2)`, which are not part of the tracking code.
	+ Finally, it joins the remaining characters back into a single string using `join('.')`.

**Pros and Cons:**

* Pros:
	+ Simple and straightforward implementation.
	+ Easy to understand for developers familiar with JavaScript string manipulation.
* Cons:
	+ The use of `splice()` can be inefficient if the resulting array is large, as it creates new arrays instead of manipulating the original one in place.

### 2. "Regex"

This test case measures the performance of using a regular expression to extract and manipulate the tracking code from the `cookie` string.

* The benchmark definition is: `(('; ' + cookie).split('; _ga=').pop().split(';').shift().match(/GA1\\.[0-9]{1}\\.(.+)/)[1]`
	+ This code concatenates the `cookie` string with a semicolon (`;`) to create a new string.
	+ It then splits this concatenated string at the substring "_ga=".
	+ The resulting array is popped (taking the last element).
	+ This element contains the tracking code without the "_ga=" prefix.
	+ The code removes the first semicolon and any trailing characters from this string using `split()` and `shift()`.
	+ Finally, it uses a regular expression to extract and return only the tracking code.

**Pros and Cons:**

* Pros:
	+ More efficient than manual string manipulation for large strings.
	+ Can be more readable for developers familiar with regular expressions.
* Cons:
	+ The use of regular expressions can add overhead due to the complexity of the pattern.
	+ May require more memory and CPU cycles to execute.

**Library: None**

There is no specific library used in these test cases. However, if you were to extend this benchmark to support other libraries or frameworks, it would be essential to consider their performance implications on string manipulation tasks like these.

**Special JavaScript Feature/ Syntax:**

No special JavaScript features or syntax are explicitly mentioned in the provided code examples.

Related benchmarks:

Ga cookie grabber (version: 0)

Ga

Comparing performance of: Split vs Regex

Created: 4 years ago by: Guest

Jump to the latest result

Split

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):