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Re: Demo: Modelling Cost of Travel Paths Between Towns

From: Neo <neo55592_at_hotmail.com>
Date: 2 Dec 2004 08:19:13 -0800
Message-ID: <4b45d3ad.0412020819.1fe783ba@posting.google.com>


> Hugo would like to see his $1000, you fraud.

Please demonstrate Neo is a fraud by showing that Hugo's RM Solution #1 and #2 aren't nearly twice as slow as XDb1's even when XDb1 is executed on a 5.6X slower machine. See measurements below. You are weclome to download XDb1 (see www.xdb1/example/ex076.asp) and verify it against Hugo's solutions.

Not only are Hugo's solutions slower, but they are not as generic or normalized. For instance, Hugo's solution cannot represent the following cases without NULLs or redundant data (XDb1's solution is normalized down to symbols):

Case1: God is the parent of an unnamed person. God is also the parent of second person with three names (string 'john', integer 100, decimal 3.14).

Case2: john isa person. john's color is brown. mary isa person. mary's color is brown. brown is a person.  

As shown by the measurements made below, even when executed on a 5.6 times slower 233 Mhz Pocket PC, XDb1 generated the small common ancestor report nearly twice as fast as Hugo's non-normalized, non-generic SQL Server 2000 Solution running on a 1,300 MHz desktop.

Small Report Generation Summary (provided by Hugo)



Solution Time(ms) Platform Notes
-------------- --------  ----------------- --------------------------
RM#1 SqlSrvr2K  14.3     1.3 Ghz PC        Unnormalized, non-generic
RM#2 SqlSrvr2K  11.0     1.3 Ghz PC        Unnormalized, non-generic


Small Report Generation Summary (provided by Neo)



Solution Time(ms) Platform Notes
-------------  --------  ----------------- --------------------------
RM#1 SqlSrvr7   65.0     500 Mhz Server    Unnormalized, non-generic
RM#2 SqlSrvr7   68.9     500 Mhz Server    Unnormalized, non-generic
XDb1 4.5.7       1.632   500 Mhz Server    Normalized, generic
XDb1 4.5.9       6.561   233 MHz PocketPC  Normalized, generic


Large Report (28,940 rows) Generation Summary (provided by Neo) 200 Goat Hierarchy (5 generations x 40 goats/generation, each goat having two parents, except 1st gen).



Solution Time(sec) Platform Notes
-------------  --------  ----------------- --------------------------
RM#5 SqlSrvr7   40.5     500 Mhz Server    Unnormalized, non-generic
XDb1 4.5.7       2.9     500 Mhz Server    Normalized, generic
XDb1 4.5.9      16.971   233 Mhz PocketPC  Normalized, generic


Larger Report (276,620 rows) Generation Summary (provided by Neo). 400 Goat Hierarchy (10 gen x 40 goats/gen),



Solution Time(ms) Platform Notes
-------------  --------  ----------------- --------------------------
RM#5 SqlSrvr7  105 min   500 Mhz Srvr, NT  Avg of 2 runs, UnNrm,UnGen
XDb1 4.5.10     44 min   500 Mhz Srvr, NT  Avg of 2 runs, Norm, gener
XDb1 4.5.10     57 min   450 Mhz PC, 98    1 run, Normalized, generic
XDb1 4.5.10 195 min 233 Mhz PocketPC 1 run, Normalized, generic Received on Thu Dec 02 2004 - 10:19:13 CST

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