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Archived Messages for CLAS_GSIM@cebaf.gov: More speed tests

More speed tests

David Rowntree (TREE@mitlns.mit.edu)
Mon, 23 Mar 1998 13:17:13 -0500 (EST)

Hello Everyone,

I have rerun a bunch of the speed tests using the first 100 events of
Will's 2.4gev_p_tgt_1.evt data file, and his 2250_6000_1.ffread file. Some
differences from past results are to be expected, since there are fewer
showering particles in this data set, and the cutoffs for stopping to track
particles have gone from a combination of 1 and 10 MeV to 100 keV. I don't
think any conclusions significantly change, however.

Default - everything on: 9.99s
EC1 turned off: 9.24s
EC turned off: 7.24s
EC+EC1 turned off: 6.49s
FOIL turned off: 9.00s
MINI torus turned off: 5.05s
DC turned off: 8.55s
TORUs turned off: 10.22s
CC+SC turned off: 7.83s
ALL turned off: 0.11s

NOSEC EC: 7.72s
NOSEC EC1: 9.37s
NOSEC DC+FOIL+CC+SC+TORU+MINI: 7.53s
NOSEC ALL: 0.98s

So no one component seems to dominate the time. The first thick object a
particle encounters seems to start the shower process, but if that is removed,
it starts in the next object. The time is clearly dominated by the tracking of
secondaries (`conventional wisdom'), just not in a particular component.

-David