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Regular expresion vs string manipulation
(version: 0)
Get X and Y from the translate function in the transform attribute of an svg element
Comparing performance of:
string manipulation vs Regular expresions
Created:
4 years ago
by:
Guest
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Tests:
string manipulation
let t = "translate(510.71232489429394,590.0821955359751)"; const pos = t.replace("translate(","").replace(")","").split(",");;
Regular expresions
let t = "translate(510.71232489429394,590.0821955359751)"; var pos = /translate\(\s*([^\s,)]+)[ ,]([^\s,)]+)/.exec(t);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
string manipulation
Regular expresions
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Definition:** The benchmark is comparing two approaches to extract values from a string: 1. **String Manipulation**: Using JavaScript's built-in string methods (`split()`) to extract values. 2. **Regular Expressions (RegEx)**: Using a regular expression pattern to match and extract values. **Options Compared:** * **String Manipulation**: This approach uses the `split()` method, which splits a string into an array of substrings based on a specified separator. * **Regular Expressions (RegEx)**: This approach uses a regular expression pattern (`/translate\\(\\s*([^\\s,)]+)[ ,]([^\\s,)]+)/`) to match and extract values. **Pros and Cons:** * **String Manipulation:** + Pros: - Typically faster and more efficient than RegEx. - Easy to read and maintain. + Cons: - Limited flexibility in terms of matching patterns. - May not handle edge cases or malformed input well. * **Regular Expressions (RegEx):** + Pros: - Highly flexible and powerful for pattern matching. - Can handle complex patterns and edge cases. + Cons: - Typically slower than string manipulation due to the overhead of compiling and executing RegEx patterns. - Can be more difficult to read and maintain. **Library/Functionality:** There is no external library used in this benchmark. However, it's worth noting that the `exec()` method on a RegExp object returns an array of matches, which is used in both test cases. **Special JS Feature/Syntax:** * **RegEx Syntax**: The benchmark uses the `/` character to start a RegEx pattern and the `\s*`, `\(`, `\)` characters as escape sequences. This syntax is specific to JavaScript's RegExp engine. * **Test Case Use of `exec()` Method**: Both test cases use the `exec()` method on a RegExp object to execute the regular expression pattern against the input string. **Other Alternatives:** If you need more flexibility in terms of pattern matching or performance, you might consider using other approaches: * **Using a third-party library like esregex**: A JavaScript implementation of the Unicode regular expression standard. * **Using a more specialized library like regex-.escape**: For escaping special characters in RegEx patterns. Keep in mind that the best approach will depend on the specific requirements and constraints of your use case.
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