Hi Laurent, You do not provide enough information to describe your case. Could you send me a script as short as possible simulating what you are doing and showing the performance problem? Is your X server running on the client machine ? Rene Brun Laurent Mirabito wrote: > > Hello all, > > I wrote a small online monitoring program displaying data from a Si > detector. Mainly it consists of one acquisition method updating histograms > and displaying them in different canvas. It works well and my only worry > is the drawing speed. In some canvas I would like to have a "scope" mode > displaying all events (namely 100 event/s when I do not draw those 512 > bins histograms) but I can hardly draw 10 % of events. > > I use the standard method to update the drawing: > > if (fRawSelected && cnt%2 == 0 ) // Raw data canvas selected > { > fcRaw->cd(); // change to the canvas > fHRaw[fCurrentEntry-1]->Draw(); // Histo drawing > fcRaw->Modified(); // flag modified > fcRaw->Update(); // Update the Pad > } > Is there any setting I can modify to improve the speed of this > application? > > Many thanks in advance for the answer. > > Laurent Mirabito > IPN Lyon > >
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