I have a ROOT tree that is about 6MB compressed, and maybe 15MB uncompressed (although I don't remember exactly how big at the moment). Now whenever I try to simply define the branches in order to read in events (i.e. I execute the code produced by TTree::MakeCode()) ROOT seems to want to unpack the whole thing into memory. Usually this is fine, but when I try to use it on my 32MB home PC (linux or windows) it just swaps incessantly and I never get the prompt again. Thus, my question is: Is there a parameter I can tune in the reading or writing to make a more memory-friendly tree? Thanks, Peter --------------------------------------------------------------------------- Peter Steinberg, Columbia University E-mail: peter.steinberg@cern.ch Nevis Laboratories URL: http://wwwcn.cern.ch/~steinber P.O. Box 137 Home Phone: (212)678-5971 Irvington, NY 10533 ---------------------------------------------------------------------------
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