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BF Split vs Regex
(version: 0)
Comparing performance of:
Split vs Regex
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
assetName = 'brandfolder-logo.jpg'
Tests:
Split
assetName.split('.')[0]
Regex
assetName.replace(/\.[^/.]+$/, '')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Split
Regex
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser/OS:
Chrome 120 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=489154" width="100%" height="500px"></iframe>
Test name
Executions per second
Split
5945025.5 Ops/sec
Regex
4033320.8 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks. **Benchmark Overview** The provided JSON represents a benchmark test case on MeasureThat.net, which compares two approaches to extract the file extension from a string: `assetName.split('.')[0]` (Split) and `assetName.replace(/\\.[^/.]+$/, '')` (Regex). **Test Case Explanations** 1. **Split**: This approach uses the `split()` method of JavaScript arrays to split the `assetName` string into an array of substrings, and then returns the first substring (`[0]`). The regular expression `\\.\\.` matches a literal dot followed by another dot. * Pros: + Simple and efficient + Easy to understand and maintain * Cons: + May not work correctly with file paths containing multiple dots (e.g., `assetName = 'file.path.jpg'`) 2. **Regex**: This approach uses a regular expression (`\\.[^/.]+$`) to match the last occurrence of a dot followed by any characters except `/` or a dot (`[^/.]+`). The `$` symbol ensures that the pattern must be at the end of the string. * Pros: + More flexible and accurate than Split, especially with file paths containing multiple dots * Cons: + May be slower due to regular expression engine overhead + Less intuitive and harder to maintain for beginners **Library: No external library is used in this benchmark.** **Special JavaScript Features or Syntax: None** **Other Alternatives** If the developers want to explore alternative approaches, they can consider: 1. **Using a dedicated file extension extraction function**: Implementing a custom function that uses a combination of string manipulation and regular expressions to extract the file extension. 2. **Using a library like Path.js**: A popular JavaScript library for working with file paths and extensions. It provides a `path ext` method, which can be used as an alternative to Split and Regex. **Additional Considerations** When benchmarking different approaches, it's essential to consider factors like: 1. **Browser and platform support**: Ensure that the benchmark is compatible with various browsers and platforms. 2. **Code maintenance and readability**: Choose a approach that is easy to understand and maintain, as well as performant. 3. **Edge cases**: Test for corner cases, such as file paths containing multiple dots or special characters. By considering these factors, developers can create more robust and reliable benchmarks like this one on MeasureThat.net.
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