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regex vs if3
(version: 0)
regex vs if
Comparing performance of:
regex vs if
Created:
4 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
var estimatedDate = new Date();
Script Preparation code:
var estimatedDate = new Date();
Tests:
regex
estimatedDate.toISOString().match('[0-9]{2}:[0-9]{2}')
if
`${estimatedDate.getHours() < 10 ? `0${estimatedDate.getHours()}` : estimatedDate.getHours() }:${ estimatedDate.getMinutes() < 10 ? `0${estimatedDate.getMinutes()}` : estimatedDate.getMinutes() }`
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
regex
if
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net. **What is being tested?** MeasureThat.net provides a platform for users to create and run JavaScript microbenchmarks, which measure the performance difference between two approaches: using regular expressions (regex) and using an if statement with conditional expressions (also known as ternary operators). In this specific benchmark, we have two test cases: 1. `regex`: This test case uses a regular expression to extract the hour part of a date string in ISO format. 2. `if3`: This test case uses an if-ternary operator to achieve the same result. **Options compared** We're comparing two approaches: * **Regex**: Using regular expressions to extract the hour part from a date string. Regular expressions are a powerful way to match patterns in strings, but they can be computationally expensive. * **If3 (Ternary Operator)**: Using an if-ternary operator to conditionally format the date string. This approach is more straightforward and efficient than regex. **Pros and Cons** **Regex:** Pros: * Regular expressions are a powerful pattern-matching tool that can handle complex text processing tasks. * Can be used for multiple purposes beyond just formatting dates. Cons: * Can be computationally expensive, especially when dealing with large strings or complex patterns. * May not perform well on older browsers or systems. **If3 (Ternary Operator):** Pros: * Efficient and straightforward to implement. * Fast execution speed due to the simplicity of the conditional expression. Cons: * Limited use cases beyond simple formatting tasks. * May be less flexible than regex for handling complex text patterns. **Library used** In this benchmark, we don't see any external libraries being used. The `Date` object is a built-in JavaScript library that provides date and time-related functionality. **Special JS feature or syntax** We're not seeing any special JS features or syntax here, just standard JavaScript language constructs. **Other alternatives** If you wanted to use alternative approaches to formatting the date string, some possible options could include: * Using the `padStart()` method (available in modern browsers) to pad the hour with leading zeros. * Implementing a custom date formatting function using arithmetic operations and conditional statements. * Utilizing a library like Moment.js or Luxon for date formatting. Keep in mind that each of these alternatives would require different code implementations, which might impact performance compared to the original if-ternary operator approach.
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