Benchmark: Array split vs string substring 2

Script Preparation code:

var s1 = 'setting.5d9998a0-70d6-4f47-b8c9-6afa75892a81.name'

Tests:

Array.split
s1.split('.')[1]
Substring
s1.replace('setting.', '').replace('.name', '')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.split
Substring

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

The test case compares two approaches to extract a substring from the string `s1`:

1. **Array.split**: This approach uses the `split()` method, which splits a string into an array of substrings using a specified separator (in this case, `.`). The first element of the resulting array (`[0]`) contains the desired substring.
2. **Substring**: This approach uses two consecutive calls to the `replace()` method:
	* The first call replaces all occurrences of "setting." with an empty string, effectively removing the prefix.
	* The second call replaces all occurrences of ".name" with an empty string, effectively removing the suffix.

Now, let's discuss the pros and cons of each approach:

**Array.split**

Pros:

* Efficient: Splitting a string into an array is generally faster than performing two consecutive replacements.
* Concise: A single method call is often preferred over multiple method calls.

Cons:

* Verbose: The resulting code is more complex, as you need to access the first element of the resulting array.
* Unintuitive: Some developers might find it less intuitive to use an array-based approach for a simple substring extraction.

**Substring**

Pros:

* Concise: Two consecutive `replace()` calls are often preferred over using `split()` for simplicity and readability.
* Intuitive: The code is more straightforward, as you're directly manipulating the string without creating an intermediate data structure.

Cons:

* Less efficient: Performing two consecutive replacements can be slower than splitting a string into an array.
* Error-prone: If the separator or suffix changes, the code might become less readable and harder to maintain.

Other considerations:

* **Performance**: The benchmark measures execution frequency per second. In this case, `Array.split` appears to be slightly faster on Chrome 91 on a Desktop (Mac OS X 10.15.7).
* **Readability**: Both approaches have their strengths and weaknesses in terms of code readability. The choice between them ultimately depends on the specific requirements of your project.

Now, let's take a look at some additional JavaScript features or syntax:

* In the `Script Preparation Code`, we see the use of template literals (e.g., `s1 = 'setting.5d9998a0-70d6-4f47-b8c9-6afa75892a81.name'`). Template literals are a convenient way to create string literals with embedded expressions, but they're not unique to this benchmark.

The libraries used in the test case are:

* None explicitly mentioned. However, we can infer that the `replace()` method is part of the JavaScript built-in API (ECMAScript).

If you'd like to explore alternative approaches or alternatives, some options include:

* Using a regular expression with `String.match()` for substring extraction.
* Utilizing a dedicated string manipulation library (e.g., moment.js) if performance-critical code requires more complex operations.

Feel free to ask me any follow-up questions!

Related benchmarks:

Array split vs string substring 2 (version: 0)

Comparing performance of: Array.split vs Substring

Created: 4 years ago by: Guest

Jump to the latest result

Array.split

Substring

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):