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endsWith vs Regex
(version: 0)
Comparing performance of:
Regex vs endsWith
Created:
5 years ago
by:
Guest
Jump to the latest result
Tests:
Regex
"this is a test".match("test$")
endsWith
"this is a test".endsWith("test")
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Regex
endsWith
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
10 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser/OS:
Chrome 137 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=612345" width="100%" height="500px"></iframe>
Test name
Executions per second
Regex
5265262.5 Ops/sec
endsWith
90444824.0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll explain the benchmark and its components in detail. **Benchmark Overview** The given JSON represents a JavaScript microbenchmark, where users can compare the performance of different approaches to check if a string ends with a specific substring or pattern. The benchmark is defined by two test cases: `endsWith` and `Regex`. **Options Compared** The benchmark compares the performance of two options: 1. **endsWith**: This method returns a boolean value indicating whether the original string ends with the specified substring. 2. **Regex**: This approach uses a regular expression (regex) to search for the specified pattern at the end of the string. **Pros and Cons** ### EndsWith Pros: * Simple and straightforward implementation * Fast execution, as it only requires a single iteration over the string's characters * Easy to understand and implement Cons: * May not work correctly with non-ASCII characters or Unicode strings * Can be slower than Regex for large strings due to the overhead of the `endsWith` method ### Regex Pros: * Flexible and powerful pattern matching capabilities * Can handle non-ASCII characters and Unicode strings correctly * Faster execution for large strings, as it can take advantage of optimized regex engines Cons: * More complex implementation, which may lead to errors or performance issues if not implemented correctly * Slower execution compared to `endsWith` due to the overhead of compiling and executing the regex pattern **Library** In the provided benchmark, there is no explicit mention of any libraries being used. However, in general, both `endsWith` and Regex methods are built-in JavaScript functions that do not require any external dependencies. **Special JS Features or Syntax** There are no special JavaScript features or syntax mentioned in this benchmark. Both test cases use standard JavaScript methods and operators. **Other Alternatives** If you need to compare the performance of other string manipulation approaches, here are some alternatives: * **Substring**: Instead of checking if a string ends with a substring, you can try using the `substring` method to extract a subset of the original string. * **indexOf**: You can use the `indexOf` method to search for the specified substring within the original string. If the substring is found at the end of the string, it returns the last index of the match. * **Regular expressions with anchors**: You can modify the regex pattern to include anchor characters (`^` and `$`) to ensure that the match is performed only at the end of the string. Keep in mind that these alternatives may have different performance characteristics compared to `endsWith` and Regex, depending on the specific use case and requirements.
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