[ROOT] Slow down in reading TTree

From: Victor Perevoztchikov (perev@bnl.gov)
Date: Wed May 14 2003 - 17:13:30 MEST

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Dear rooter,
during transition from ROOT 3.03.09 ==> 3.05.04 in STAR experiment
we found that reading of TTree is 2.5 times slower in new version.
Timong
3.03.09: Real: 38.42 CPU: 36.93
3.05.04  Real: 93.94 CPU: 93.21

DST was produced by ROOT 3.03.09
Reading a few branches from big TTree


Any ideas why?
May be old format is still supported but slowly?


Victor


Victor M. Perevoztchikov   perev@bnl.gov         
Brookhaven National Laboratory MS 510A PO Box 5000 Upton NY 11973-5000
tel office : 631-344-7894; fax 631-344-4206;

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