The problem is all in this small piece of code
ByteArrayOutputStream bbs = new ByteArrayOutputStream();
BufferedOutputStream bos = new BufferedOutputStream(bbs);
trans.eseguiTrasformazioneOut(bos);
try {
bos.flush();
initReponse(xpFileTypeOut.getMimeType(), xpFilename);
bbs.writeTo(getOutputStream());
} catch (IOException ex) {
Messaggi.getErrori().getLogger().error("Errore in emettiFile ", ex);
}
The yellow instruction take 100 ms in Tomcat7, quite stable on all clients, in
Tomcat8 it takes from 50 ms to 4500 ms stable on a single client PC but very
different from client to client.
Tks
Tullio
> Subject: Re: Performance regression from 7 to 8
> To: users@tomcat.apache.org
> From: ma...@apache.org
> Date: Fri, 4 Mar 2016 09:42:22 +0000
>
> On 04/03/2016 09:39, Tullio Bettinazzi wrote:
> > I applied tour suggestion and analyzed, with firebug, the composition of
> > the time.
> > The difference between 7 and 8 is the "receiving" time which is more or
> > less zero in 7 and 2sec. in 8.
> > How can I understand such difference ?
>
> Try creating the simplest possible web application that demonstrates the
> problem.
>
> Mark
>
>
> > Tks
> > Tullio
> >
> >
> > P.S. : same server, same client, same network, same code both 7 and 8
> > installed from scratch
> >
> >> Subject: Re: Performance regression from 7 to 8
> >> To: users@tomcat.apache.org
> >> From: geor...@mhsoftware.com
> >> Date: Thu, 3 Mar 2016 09:30:33 -0700
> >>
> >>
> >>
> >> On 3/3/2016 4:06 AM, Tullio Bettinazzi wrote:
> >>> I've an application in which I write a page from a Buffered Stream
> >>> directly to the Servlet output stream (more or less 300kb).
> >>>
> >>> In 7 it works perfectly (100ms).
> >>>
> >>> In 8 , depending from the network connection and mainly from the
> >>> http client itself (the browser in the PC) the same operation takes from
> >>> 50ms to 4500 ms.
> >>
> >> One of the things I would look at is the browser debug window. Open the
> >> debugger, and go to the Networks/Timings tab and load both pages. That
> >> would give some insights as to what's happening. Perhaps it is the page.
> >> Perhaps there's something else.
> >>
> >>>
> >>> On the same PC I find more or less the same time using Chrome and Firefox
> >>> also changing network connections (wifi, lan, adsl).
> >>>
> >>> Could someone suggest a solution ?
> >>>
> >>> Tks
> >>> Tullio
> >>>
> >>
> >> --
> >> George Sexton
> >> *MH Software, Inc.*
> >> Voice: 303 438 9585
> >> http://www.connectdaily.com
> >
> >
>
>
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