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[FIX] [message #15672] Wed, 06 November 2013 15:43 Go to previous message
Ralf Kliemt is currently offline  Ralf Kliemt
Messages: 507
Registered: May 2007
Location: GSI, Darmstadt
first-grade participant

From: *
Hi everybody.

The plots from last monday meeting (see here) showed strang result for the PRG fitter. I found the simple solution: For reasonable results one needs at least two iterations.
That's it.

I produced the plots again, doing two iterations in the PRG Fast, PRG Full and KinVtx fitters. You find them to be almost identical (for that clinical ensemble of tracks).
The very last plot shows off how much time was needed to run these algorithms. I.e. only the Fit() calls were measurted, not plotting the histograms and the used time is the "real time". One can see how the consumption is factors larger when compared to the POCA finder, as expectd.

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