Hello,
I have an online application which includes a 500x500 bin TH2F which I
display in response to a timer with
p2DH->Draw("colz");
gPad->GetCanvas()->Update();
(I've previously called gStyle->SetPalette(1,0)) Early on, when the
histogram is still young, the refresh is pretty quick - refreshing at 2 Hz
uses a small amount (<10%) of the cpu time. Gradually, as the histogram
fills, the refresh time increases - by the time the histogram has a few
hundred thousand entries, (maximum bin contents is in the 10s) the cpu time
is 80% and climing.
Is there something I could do to speed things up, short of adjusting the
refresh rate? I am using version 3.03/08 on Win32. Thanks...
Ed Oltman
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