Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
regex.test v includes
(version: 0)
Comparing performance of:
includes vs regex
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var text = `{"A lot more stuff than what we have before and by a lot more i don't actually mean that much more but it's still more FetchInputEventCrashTimeout":"Watchdog FetchInputEvent were not being fed for 30000 milliseconds.Crash timeout was set to 30000 milliseconds."}`
Tests:
includes
if (text.includes("Watchdog")) { console.log("something"); }
regex
const regex = /\bWatchdog/; if (regex.test(text)){ console.log("something"); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
includes
regex
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):
I'd be happy to help you understand the JavaScript benchmark provided by MeasureThat.net. **Overview** The benchmark tests two different approaches for searching a specific string within another string: 1. **Using the `includes()` method**: This approach uses the `includes()` method, which checks if a substring is present in a given string. 2. **Using a regular expression (regex)**: This approach uses a regex to search for a pattern within the string. **Options Compared** Both approaches are compared to measure their performance and accuracy. The benchmark focuses on the execution time of each approach, as well as any potential crashes or errors that may occur. **Pros and Cons** * **`includes()` method**: Pros: + Easy to use: simply pass the substring you want to search for. + Fast: often faster than regex for simple searches. Cons: + May not be suitable for complex searches, as it only checks if a substring is present in any order. + Can lead to poor performance if the string being searched is very large. * **Regular Expression (regex)**: Pros: + Flexible: can be used to search for patterns with specific characters, escape sequences, and grouping. + Powerful: can be used to perform complex searches, such as searching for patterns across multiple strings. Cons: + Steeper learning curve: requires understanding of regex syntax and patterns. + Can lead to poor performance if not optimized correctly. **Library Used** There is no explicit library mentioned in the benchmark definition or test cases. However, it's likely that the `includes()` method uses an internal implementation provided by JavaScript, while the regex approach relies on a custom regex engine (e.g., V8's regex engine). **Special JS Feature or Syntax** The benchmark does not use any special JavaScript features or syntax beyond what is standard in JavaScript. The only notable feature used is the `includes()` method, which is a built-in method introduced in ECMAScript 2015. **Other Alternatives** If you're looking for alternative approaches to search within strings, some other options include: * **Using `indexOf()` and `lastIndexOf()`**: These methods can be used together to find the index of the first and last occurrences of a substring. * **Using `String.prototype.replace()`:** This method can be used with a regex pattern and replacement string to search for and replace substrings. * **Using third-party libraries or modules**: There are many JavaScript libraries and modules available that provide optimized regular expression engines, such as UglifyJS or regex-optimizer. Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to the `includes()` method and regex approach.
Related benchmarks:
includes v regex
regex v includes
regex vs compiled regex vs includes
RegEx.test vs RegEx.match when fails
Comments
Confirm delete:
Do you really want to delete benchmark?