performance

[classjing]

Hello, after using it, I found that each Java parsing takes about 20ms, but PHP parsing can be completed within about 5ms, Java performance is too poor, I wonder if you have noticed the performance problem, looking forward to your recovery, thank you

[mngsk]

Hello, thanks for your comment.

I know that the PHP version does a concatenation of all the regexes into a single one, which they use to see if there's any match before trying to actually parse the user agent. I didn't implement that behaviour in my version but maybe it's worth a try. Unfortunately I don't know when I will be able to work on that. If anyone has a chance, that'd be very helpful.

The other thing that I remember is that the PHP version has an internal cache mechanism which I didn't implement in java because I think that's out of the scope of this project; there are several cache libraries in java to choose from which can help improve performance in live environments with repetitive user agents.