Re: TPad based legend shown on screen and eps, not png/gif.

Hi Brett,
now it's fixed:
On my 800 MHz machine I got the following results from runnig yours test_imagedump.C

before - 394 sec.
after the fix - Real time 0:00:04, CP time 3.990

Thanks for reporting it.

Regards. Valeriy

Valeriy Onuchin wrote:

> Hi Brett,
> I appologize, I was not correct in my previous statements.
> The ROOT TPostScript, TPDF drivers were highly optimized
> by Olivier Couet in order to minimize an amount of PS instructions
> for drawing operations. So, an output EPS file does not
> contain 0.5 millions "line draw" instructions (much less).
> For your case which deals with huge ammout of points in TGraph
> using TPostScript, TPDF is an optimal.
> TImageDump class was developed very recently and it lacks
> of such optimization and not ready for dealing with such cases.
> At the moment I'm working on optimisation of TImageDump in a way
> how it was done in TPostScript, TPDF classes.
>
> Regards. Valeriy
>
> Brett Viren wrote:
>
> > Hi again Valeriy
> >
> > Valeriy Onuchin <Valeri.Onoutchine_at_cern.ch> writes:
> >
> > > Hi Brett,
> > > "dissapearing legend" bug was fixed. Now in CVS.
> > > Thanks to you and Mike Kordosky.
> > > Concerning "0.5 millions points drawn as bars" slow drawing
> > > I hope to speed up it ~100 times. I'm curious, produced EPS
> > > file has a size 8Mbytes and contains PS istructions to draw
> > > 0.5 millions lines, how quick this file is printed by PS printer?
> >
> > Thanks for your fixes, I'll try them today.
> >
> > I have not tried printing this large file. But just viewing the EPS
> > under "gv" takes about 15 seconds with antialiasing on. W/out aa
> > about 1 second.
> >
> > BTW, just in case you (or others) haven't heard of it, Google's
> > perftools can really help in finding and reducing bottlenecks. See
> > the cpu profiler part of: http://goog-perftools.sourceforge.net/
> >
> > Regards,
> > -Brett.
Received on Sun May 22 2005 - 23:40:15 MEST