Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
regex vs chars
(version: 0)
Comparing performance of:
regex vs char
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var str = "{612704963294y923yre0923y1r9e23y13-3243214}";
Tests:
regex
str.replace(/[{}]/g, "");
char
str.replace("{", "").replace("}","");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
regex
char
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **What is being tested?** MeasureThat.net is testing two different approaches to replace characters in a string: using regular expressions (regex) and using character literals (specifically, escaping curly brackets `{}`). The test case consists of two individual tests: 1. `str.replace(/[{}]/g, "\");`: This test uses regex to replace both `{` and `}` with an empty string. 2. `str.replace("{", "\").replace("}", "\");`: This test uses character literals to replace only the `}` (which is escaped using a backslash) and leaves the `}` intact. **Options being compared:** We have two options being compared: A) Regex-based approach (`str.replace(/[{}]/g, "\");`): * Pros: + Can be more flexible and powerful for matching patterns. + Often provides better performance for complex pattern matches. * Cons: + Can be slower due to the overhead of parsing regex patterns. + May require more time and effort to write efficient regex patterns. B) Character literal-based approach (`str.replace("{", "\").replace("}", "\");`): * Pros: + Typically faster and more lightweight compared to regex. + Easier to read and understand, especially for simple replacements. * Cons: + Limited to only replacing specific characters; not suitable for complex patterns. **Other considerations:** When choosing between these two approaches, consider the following: 1. Complexity of pattern: If you need to match more than just `}` (e.g., other special characters), regex might be a better choice. 2. Performance requirements: If speed is crucial, character literals might be a better option. 3. Readability and maintainability: For simple cases, character literals can be easier to understand. **Library/Tool usage:** There is no explicit library mentioned in the provided benchmark. However, it's likely that MeasureThat.net provides its own implementation of string replacement functions, which might be optimized for performance. **Special JS features/syntax:** The test uses a recent version of JavaScript (specifically, ECMAScript 2015+), which supports modern language features such as template literals (`{}`) and backticks (`\`).
Related benchmarks:
RegExp.test() vs String.match()
str split vs regex replace
parseFloat isNaN vs RegEx parseFloat
Length vs regex
Comments
Confirm delete:
Do you really want to delete benchmark?