Re: Help: Xalan runs toooo slow on Tomcat

[Scott_Boag]

> and that because the servlet engine has to be able to reload classes,
> these methods are much more complicated, and therefore much slower,  in
that
> environment.

Wow, now that's interesting.  I guess I'll have to take a look that this.

-scott




                                                                                       
                            
                    Jeff Lansing                                                       
                            
                    <jeff@polexis        To:     [EMAIL PROTECTED]              
                            
                    .com>                cc:     (bcc: Scott Boag/CAM/Lotus)           
                            
                                         Subject:     Re: Help: Xalan runs toooo slow 
on Tomcat                    
                    06/28/01                                                           
                            
                    04:03 PM                                                           
                            
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Li Liang wrote:

> Thansk for the reply, scott.
>
> Hopefully 2.2.0 will solve this problem. I still don't understand why
> there's such a big performance difference between command-line and
> Tomcat? BTW, I tried XT executable on NT from command line, it only took
> 3 seconds!

Hi,

I had a performance problem which was like this, in that some code running
as an application was dozens of times faster that the same code running as
a
servlet. Eventually I was able to track the difference down. It turned out
that the problem code was using Class.forName() and Class.newInstance() a
lot, and that because the servlet engine has to be able to reload classes,
these methods are much more complicated, and therefore much slower,  in
that
environment.

It's just a guess, but Xalan does use these methods a lot too, and that
might be related to your problem.

Jeff