Hi rooters, How to solve in the best way the following problem (I think very common): I have big bank of events ~30000 and I need the fast access to them by the event identifier. Now my events are stored in the Tree and it is very convinient for analysis. But then I need to get event by it's identifier it is not straightforward. One branch (leaf) of the tree is the eventID. So if I need to get the event NNNN the obvious way is to loop this branch by all entries upto eventID==NNNN. Due to split algorithme it is not slow, but for the big number of events the time penalty is significant especially if I need to do this operation 3000 times. To speedup the process I created for this tree the hashtable keeping the special objects with 2 numbers : eventID and Entry. Using this hashtable I can fastly find event Entry by the eventID and then get the event from Tree by the Entry. It works. But this solution seems to me not very elegant. May be in Root already exists something more automatic? Regards Valeri
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