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Regex First Name split vs match - no console
(version: 2)
Comparing performance of:
Regex vs Split
Created:
4 years ago
by:
Registered User
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Script Preparation code:
var str = 'Pedro de Alcântara Francisco Antônio João Carlos Xavier de Paula Miguel Rafael Joaquim José Gonzaga Pascoal Cipriano Serafim de Bragança e Bourbon';
Tests:
Regex
str.match(/^.+(\s)/)
Split
str.split(' ')[0]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Regex
Split
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided JSON and explain what's being tested, compared, and the pros and cons of each approach. **Benchmark Definition** The benchmark is designed to compare two approaches: 1. **Regex**: The first test case uses a regular expression (`/^.+(\\s)/`) to extract the first part of a string. 2. **Split**: The second test case uses the `split()` method with a space character (`' '`) as the separator to split a string into an array. **Script Preparation Code** The script preparation code defines a string variable `str` containing a full name: "Pedro de Alcântara Francisco Antônio João Carlos Xavier de Paula Miguel Rafael Joaquim José Gonzaga Pascoal Cipriano Serafim de Bragança e Bourbon". **Library/Functions Used** None. **Special JS Features/Syntax** Neither of the test cases uses any special JavaScript features or syntax. The regular expression is a standard regex pattern, and the `split()` method is a built-in JavaScript method. **Comparison and Pros/Cons** The two approaches are compared in terms of execution speed: 1. **Regex**: This approach involves creating a regex object and executing it using the `match()` method. * Pros: Can be more flexible for parsing complex strings, but may be slower due to the overhead of creating a regex object. * Cons: May not be as efficient as other methods, especially for very large inputs. 2. **Split**: This approach uses a simple string method (`split(' ')`) to split the input string into an array. * Pros: Typically faster than regex for simple splitting tasks, as it avoids the overhead of creating a regex object. * Cons: May not be suitable for more complex parsing or manipulation of strings. **Benchmark Result** The latest benchmark result shows that the `split()` approach is slightly faster (more executions per second) on this specific test case, running at 7402259.0 executions per second compared to 5943753.5 executions per second for the regex approach. **Other Alternatives** Some alternative approaches could be considered: 1. **Using a custom parsing function**: Instead of using `split()` or regex, a custom function can be written to parse the input string based on a specific format. 2. **Using a library like Lodash or UglifyJS**: These libraries provide optimized functions for common string manipulation tasks, including splitting and regex-based parsing. However, it's essential to note that these alternatives might not always outperform `split()` or regex, especially when considering the overhead of using additional libraries or writing custom code.
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