Re: [ROOT] Comparison of speed of accessing data

From: HP Wei (hp@rentec.com)
Date: Fri Nov 22 2002 - 15:27:08 MET


root [3] IBM.Print()
******************************************************************************
*Tree    :IBM       :                                                        *
*Entries :     2369 : Total =           36708 bytes  File  Size =      36708 *
*        :          : Tree compression factor =   1.00                       *
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*Br    0 :Date      : Date/I                                                 *
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*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    1 :Time      : Time/I                                                 *
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*............................................................................*
*Br    2 :Bid       : Bid/D                                                  *
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*............................................................................*
*Br    3 :Ask       : Ask/D                                                  *
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*............................................................................*
*Br    4 :Price     : Price/D                                                *
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*............................................................................*
*Br    5 :Bidsize   : Bidsize/I                                              *
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*............................................................................*
*Br    6 :Asksize   : Asksize/I                                              *
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*............................................................................*
*Br    7 :Size      : Size/I                                                 *
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*............................................................................*
*Br    8 :Upsize    : Upsize/I                                               *
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*............................................................................*
*Br    9 :Upstate   : Upstate/b                                              *
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*Br   10 :HighSoFar : HighSoFar/D                                            *
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*Br   11 :LowSoFar  : LowSoFar/D                                             *
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*Br   12 :Vwap      : Vwap/D                                                 *
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*............................................................................*

** when the root_file was generated, 
   I use all default settings for TFile(). 
   So the buffer size is the default 32000.
   
   btw, the version of ROOT I am using is 3.01/00
   running on Sun Solaris.
   
--HP



This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:51:20 MET