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Regex v split/filter/join
(version: 0)
Comparing performance of:
regex vs slpit
Created:
4 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var str = '/api/US//foo///bar/test';
Tests:
regex
str.replace(/\/\/+/g, '/');
slpit
str.split('/').filter(_ => _).join('/');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
regex
slpit
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 months ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15
Browser/OS:
Safari 26 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=629414" width="100%" height="500px"></iframe>
regex
934.7M/s
slpit
8.5M/s
View exact numbers
Test name
Executions per second
✓
regex
934,658,752 Ops/sec
slpit
8,546,756 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net! **Benchmark Definition** The benchmark definition provided is a JSON object that outlines the experiment to be performed. Here's what's tested: * The script preparation code `var str = '/api/US//foo///bar/test';` defines the input string `str`. * Two benchmark definitions are specified: 1. `str.replace(/\\/\\/+/g, '/');`: This tests the performance of the `replace()` method with a regular expression that replaces all occurrences of four consecutive forward slashes (`'\\''`) with a single forward slash (`'/"`). 2. `str.split('/').filter(_ => _.includes('/')).join('/');`: This tests the performance of the `split()`, `filter()`, and `join()` methods in sequence. **Options Compared** The two benchmark definitions compare different approaches to achieve the same goal: * **Regex (replace())**: Uses a regular expression to replace all occurrences of four consecutive forward slashes with a single forward slash. * **String manipulation (split(), filter(), join())**: Splits the string into an array using `/` as the separator, filters out elements that do not contain `/`, and then joins the remaining elements back into a string. **Pros and Cons** Here's a brief analysis of each approach: ### Regex (replace()) Pros: * **Efficient replacement**: The regular expression can replace all occurrences in a single operation. * **Flexible**: Can be used to perform complex text replacements. Cons: * **Overhead**: Regular expressions can introduce additional overhead due to parsing and compilation. * **Slower for large inputs**: May be slower than string manipulation methods for very long input strings. ### String Manipulation (split(), filter(), join()) Pros: * **Simple and efficient**: Each method performs a single, well-known operation. * **Faster for large inputs**: Typically faster than regex for very long input strings. Cons: * **More steps**: Requires multiple operations to achieve the same result. * **Less flexible**: Limited to performing simple string manipulation. **Library and Special Features** The benchmark does not use any libraries or special JavaScript features. It's a straightforward test of two different approaches to achieving the same goal. **Other Alternatives** If you'd like to explore alternative approaches, consider: * Using `String.prototype.replaceAll()` (a newer method that combines replace() with a callback function) * Employing other string manipulation techniques, such as using `String.prototype.split()` with a custom separator or using `Array.prototype.filter()` and `Array.prototype.join()` separately * Optimizing the regex pattern for better performance Keep in mind that these alternatives might not be relevant to this specific benchmark definition.
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