Hi Rene, On Mon, Jan 21, 2002 at 08:42:45AM +0000, Rene Brun wrote: > In 3.02, I introduced a branch constructor supporting a collection in input. > See : http://root.cern.ch/root/html302/src/TTree.cxx.html#TTree:Branch > Branch(TCollection *list, Int_t bufsize, Int_t splitlevel, const char *name) Yes, I know. Maybe I have overlooked something, but the objects in the collections are stored as top-level branches, aren't they? I'd like to have this structure available in the tree, i.e. when browsing through it. And, as far as I know, an automatic reconstruction of the collection hierachy on read is not implemented so far. > If you run in compression mode (default), elements that do not change from > event to event will be highly compressed. See the result with TTree::Print. My concern is not disk space, it's rather speed. This would mean writing two or three TString variables every time and to compress the buffer every time. Writing is already a time consuming part. Best regards, Volker -- Dr. Volker Hejny Tel: 02461/616853 ** Institut f. Kernphysik Fax: 02461/613930 ** ---------------------------------------------------------------- ** ** --- Forschungszentrum Juelich GmbH, D-52425 Juelich **
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