[jdom-interest] Speed issues

[Alex Rosen]

The first time I use any class library, it takes a lot longer, because
the VM has to load and verify the classes (and maybe JIT some of them).
Then after that it runs faster. Is that what you're seeing?

Alex

>>> "Paul Hlasnicek" <phlasnicek at mapmobile.com> 3/17/2003 10:55:48 AM
>>>
Hi, Let me give you an idea of what I am doing and then present my
problem.
I am using jdk 1.4.1 and JDOM in a Unix environment.  My code is
middleware
and communicates to the application through socket calls.  So I create
a
document, add in all of the pieces and send the xml string over the
socket
where it is parsed by a 'C' xml parser.  I also receive the answer data
as
an xml string from the socket where I parse and send the data to the
user
interface.

There are times that after I received a response, I have to create a
new
document along with root and children and respond back to the
application.
In all of this, speed is very important.

Here is my problem:  The first time that I create the document, it
takes
well over 500 ms (sometimes up to 750 ms) just to create the xml
string, but
when I have to create a new document to respond with, it only takes
about
150 ms.  This also happens when I parse the xml string that I receive
from
the socket.  Why am I experiencing these huge differences in time to
create
and parse?  What can I do to prevent this?  Is there a way to
initialize the
document?

Thanks,
Paul Hlasnicek

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