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counter (str.match vs str.split)
(version: 0)
Comparing performance of:
String.split vs Regex.match
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
string = "{{This is a ben{{chmark to test if matching a regex is faster{{ that splitti{{ng a string";
Tests:
String.split
(string.split("{{").length - 1)
Regex.match
(string.match(/{{/g)||[]).length
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
String.split
Regex.match
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
gemma2:9b
, generated one year ago):
This benchmark on MeasureThat.net compares two methods for counting the number of occurrences of "{{" within a string: * **`String.split`**: This approach splits the string at every occurrence of "{{" and then counts the resulting substrings. * **`Regex.match`**: This method uses a regular expression (`/{{/g}`) to find all occurrences of "{{" in the string. It then returns an array containing these matches, which is then length-checked to get the count. **Pros and Cons:** * **String.split:** * **Pros:** Simpler to understand for beginners, potentially more efficient if you only need to split at a specific delimiter. * **Cons:** Can create unnecessary new arrays, potentially less performant for complex patterns. * **Regex.match:** * **Pros:** More flexible for handling complex patterns, often optimized for speed in modern engines. * **Cons:** Can be more verbose to write, might have a slight learning curve if you're unfamiliar with regular expressions. **Library Usage:** This benchmark doesn't explicitly use any external libraries. The `String` and `RegExp` objects are built-in parts of JavaScript. **JS Features/Syntax:** This benchmark demonstrates the standard string methods in JavaScript (`split`, `match`) and the use of regular expressions for pattern matching. **Alternatives:** * **Looping:** You could manually iterate through the string character by character, counting occurrences of "{{" as you go. This offers more fine-grained control but is generally less efficient than using built-in methods or regexes. * **String Replacements:** You could use `replace` with a counter and keep track of replacements, though this approach might be less readable for simple string searches like this one. Let me know if you have any more questions!
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