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Test regex vs split,splice,join
(version: 0)
Comparing performance of:
Regex vs Split and Join
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var str = '11.04.09.100.98';
Tests:
Regex
str.replace(/\.\d{1,3}$/, '')
Split and Join
str.split('.').splice(0,3).join('.')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Regex
Split and Join
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in this benchmark. **What is being tested?** The benchmark is comparing the performance of two approaches to remove the last three digits from a string: using regular expressions (`regex`) and using `split`, `splice`, and `join` methods. **Options compared** There are two options being compared: 1. **Regex approach**: This method uses a regular expression to match the last three digits (`\\d{1,3}`) in the string and replaces them with an empty string. 2. **Split, splice, join approach**: This method splits the string into an array using `.` as the separator, removes the first three elements using `splice(0, 3)`, and then joins the remaining elements back into a string using `join('.')`. **Pros and cons of each approach** 1. **Regex approach** * Pros: + More concise and expressive + Can be used for more complex pattern matching * Cons: + May be slower due to the overhead of compiling regular expressions + May not work as expected if the input string is malformed 2. **Split, splice, join approach** * Pros: + May be faster since it involves only basic array operations + Less error-prone than regex patterns * Cons: + More verbose and less expressive than regex patterns + May not work as expected if the input string is malformed **Other considerations** 1. **Library usage**: There is no explicit library mentioned in the benchmark definition or test cases. 2. **Special JS feature or syntax**: There are no special features or syntax used in this benchmark. **Alternatives** If you wanted to compare other approaches, some alternatives could include: * Using a different string manipulation method, such as `substr` or `substring` * Comparing the performance of different regex patterns * Using a library like Lodash for string manipulation * Comparing the performance of compiled vs. interpreted code In summary, this benchmark is designed to compare the performance of two approaches to remove the last three digits from a string: using regular expressions and using `split`, `splice`, and `join` methods. The regex approach has its advantages in terms of conciseness and expressiveness, but may be slower due to compilation overhead. The split, splice, join approach is more straightforward and less error-prone, but less concise and expressive.
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