Re: [ROOT] TChain after MakeClass

From: Peter H Fisher (fisherp@mit.edu)
Date: Tue Jun 03 2003 - 05:09:49 MEST


Hi Rene,

Many thanks for your help yesterday.  I am now able to chain over several
files.  I do have a few more questions:

1. When I load with the ++ option (using the root interpreter), it takes
0.5 ms per event.  Would is be faster still if I had a standalone program
or is this as good as it gets?  My student uses PAW (!) and, runnning over
the same data set takes him 3 hours, while for me it will be 11 hours.
Does this make sense to you?

2. Given the above, it might be worthwhile for me to make a reduced data
set containing only a fraction of the events.  Do you have an example of
how to do this?

Again, many thanks!

Peter

Peter Fisher                                   Office 617-253-8561
Professor of Physics                           Fax    617-253-4100
44-118 MIT	                               email  fisherp@mit.edu
Cambridge, MA, 02139



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