Hi, I have met a stupid problem ... I use TSelector to analyze a disk resident TNtuple. The TNtuple has a "simple" branch : Float_t x; TBranch *b_x; In my "TSelector::ProcessFill(Int_t entry)" I need, however, to access not only the "entry", but also "entry - 100000" and "entry + 100000" for that specific branch : b_x->GetEntry(entry); x1 = x; b_x->GetEntry(entry - 100000); x0 = x; b_x->GetEntry(entry + 100000); x2 = x; The result is that the analysis ("Process") of the ntuple takes ages ... Can I somehow speed it up ? Thanks in advance, Jacek.
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