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endsWith vs Regex correct
(version: 0)
Comparing performance of:
Regex vs endsWith vs regex neg vs endsWith neg
Created:
4 years ago
by:
Guest
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Tests:
Regex
/test$/.test("this is a test")
endsWith
"this is a test".endsWith("test")
regex neg
/test$/.test("this is a abcd")
endsWith neg
"this is a abcd".endsWith("test")
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Suite status:
<idle, ready to run>
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Test case name
Result
Regex
endsWith
regex neg
endsWith neg
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N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help explain the provided benchmark. **What is being tested?** The test cases measure the performance of two different approaches to check if a string ends with a certain suffix: 1. **Regex**: The `String.prototype.test()` method is used with a regular expression `/test$/` that matches the suffix "test" at the end of the string. 2. **endsWith**: The `.endsWith()` method is used on the string, which also checks if the string ends with the specified suffix. **Options compared** The test cases compare the performance of: * Regex (`String.prototype.test()` with `/test$/`) * `endsWith` (`.endsWith()`) in different scenarios: + With a positive match (`"this is a test".endsWith("test")`) + Without a positive match (`"this is a abcd".endsWith("test")`, which is expected to be slower) **Pros and Cons of each approach** * **Regex**: Pros: + More flexible, as it can match various patterns + Can be used for more complex string manipulations Cons: + Generally slower than other approaches due to the overhead of compiling regular expressions + May have performance issues if not optimized correctly * `endsWith`: Pros: + Typically faster than regex due to its simpler implementation + Less memory overhead compared to regex Cons: + Less flexible, as it only checks for exact suffix matches **Library and syntax used** In this benchmark, the following JavaScript library is implicitly used: * None explicitly mentioned, but `String.prototype` is used, which suggests that the standard JavaScript string object is being utilized. As there are no special JS features or syntaxes used in this benchmark, I won't mention any additional details. **Alternative approaches** Other approaches to check if a string ends with a certain suffix could include: * Using a custom implementation of `endsWith` for performance optimization * Utilizing other libraries or frameworks that provide optimized string manipulation methods (e.g., String.prototype.endswith() in some Node.js implementations) * Employing other algorithms, like Rabin-Karp or Knuth-Morris-Pratt, which are more efficient but also more complex to implement. Keep in mind that the choice of approach depends on the specific requirements and constraints of your use case.
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