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String.match vs. RegEx.test1
(version: 0)
Comparing performance of:
RegEx.test vs String.match
Created:
3 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var string = "Hello world!Hello world!Hello world!Hello world!"; var regex = /[A-Z][a-z]+ [a-z]+/;
Tests:
RegEx.test
regex.test(string);
String.match
string.match(regex);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
RegEx.test
String.match
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
6 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36
Browser/OS:
Chrome 144 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=624473" width="100%" height="500px"></iframe>
RegEx.test
42.6M/s
String.match
27.3M/s
View exact numbers
Test name
Executions per second
✓
RegEx.test
42,645,460 Ops/sec
String.match
27,343,890 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON data and explain what's being tested, compared, and considered in this JavaScript microbenchmark. **Benchmark Definition** The benchmark is comparing two approaches: 1. `regex.test(string)`: This method is part of the RegExp object, which tests if a string matches a regular expression pattern. 2. `string.match(regex)`: This method returns an array of matched strings, or null if no match is found. **Options Compared** The benchmark compares the performance of these two approaches: * `regex.test(string)` + Pros: - Simple and straightforward to understand. - Less overhead due to fewer function calls. + Cons: - May not be as efficient for large strings or complex patterns. - Only returns a boolean result, which might not be suitable for all use cases. * `string.match(regex)` + Pros: - More flexible and powerful, as it can match multiple substrings. - Returns an array of matched strings, which can be useful in certain scenarios. + Cons: - More overhead due to additional function calls and string manipulation. **Library and Purpose** The `RegExp` object is a built-in JavaScript library that provides regular expression matching capabilities. The `test()` method is used to test if a string matches a pattern, while the `match()` method returns an array of matched strings. **Special JS Feature or Syntax** There are no special JavaScript features or syntax mentioned in this benchmark. Both methods use standard JavaScript syntax and libraries (RegExp). **Other Alternatives** If you were to optimize these approaches further, some alternatives might include: * Using a more efficient regular expression pattern or escaping characters. * Implementing the `test()` method using a native implementation (e.g., via V8's internal regex engine). * Using an alternative string manipulation library like String.prototype.replace() or Intl.Collator. * Exploring asynchronous programming techniques to improve concurrency and reduce overhead. However, these alternatives are not directly comparable to the current benchmark, which focuses on comparing the performance of `test()` and `match()` methods.
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