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String.indexOf vs RegExp.test (2)
(version: 1)
Comparing performance of:
String.indexOf vs Regex.test vs Regex2.test
Created:
3 years ago
by:
Registered User
Jump to the latest result
Script Preparation code:
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RegExp("[abcd]", "g")
Tests:
String.indexOf
let counter = 0; for (let i = text.indexOf(search); i !== -1; i = text.indexOf(search, i+1)) counter++;
Regex.test
let counter2 = 0; regex.lastIndex = 0; while (regex.test(text)) counter2++;
Regex2.test
let counter3 = 0; regex2.lastIndex = 0; while (regex2.test(text)) counter3++;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
String.indexOf
Regex.test
Regex2.test
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
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
It seems like you're asking for help with a JavaScript performance benchmarking script. However, I'll need more context to provide specific guidance. From the code snippet provided, it appears that we have three benchmark tests: 1. `String.indexOf` 2. `Regex.test` 3. `Regex2.test` Each test has a slightly different approach: - `String.indexOf` uses a simple loop with string.indexOf() method. - `Regex.test` uses a while loop with regex.test(), setting lastIndex to 0 for each iteration. - `Regex2.test` also uses a while loop, but with regex2.test(), again setting lastIndex to 0. The benchmarking script seems to be running these tests on different browsers and devices. However, without the actual data from these benchmarks (e.g., rawUAString, browser, devicePlatform, executionsPerSecond), it's challenging to provide specific advice or suggestions for improvement. If you're looking to optimize performance, here are some general tips: 1. **Minimize string concatenation**: Instead of creating new strings with += operator, consider using template literals or string concatenation methods like StringBuilder (if available). 2. **Avoid unnecessary regex optimizations**: While it's good practice to optimize regex patterns for performance, over-optimizing can lead to decreased readability and maintainability. 3. **Use caching mechanisms**: If your tests involve repeated operations, consider implementing caching mechanisms to store results for faster access. To further assist you, could you provide more details about the specific issues or concerns you're facing with these benchmarks?
Related benchmarks:
Regex: exec() vs search() and test()
Regex vs split/join template string
Performance of replace() vs slice() vs split
Literal regexp's vs string and array methods
Comments
Confirm delete:
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