Re: Performance

[Vinod Panicker]

Hi Alex,

On 11/14/06, Alexander Gnauck <address@hidden> wrote:
> Hi Vinod,
> > I've been trying out the libidn jar in a Java application.
> > Specifically, I'm using the stringprep and nameprep methods.
> >
> > When I profiled the application, the profiler reported that these two
> > methods were taking the max amount of cpu time.
> >
> > Is there anything that can be done to improve the performance?
> > Currently, 50% of the app's cpu usage is taken up by libidn.
> stringprep is a process which takes lots of CPU time. I try to avoid
> unnecessary stringprep calls whenever possible, use caching and other
> methods with reduce CPU load.
> On what kind of application are you working? 50% is quite a lot.

Currently there are no unnecessary calls to stringprep in the
application. The actual problem stems from having to call
StringBuffer.charAt() and StringBuffer.contains() so many times
(millions of times in a few minutes during load). The app is an XMPP
server, so it all adds up quite fast.

Regards,
Vinod.