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Speed up the TRD2D hit reco

Alexandru Bercuci requested to merge a.bercuci/cbmroot-mcbm:mtrd2d-reco into master

Speed up the TRD2D hit reco by making TGraph fit an option for improved performance. A detailed study can be found here.

Final results after some arithmetic, to have some numbers to keep in mind :

  • ONLY TRD1D 1.939 ms/1000 hits
  • TRD1D + TRD2D 2.049/1000 hits

calculations done EXCLUDING first TS which includes also other effects. I would say that for the time being 2 ms/1000 hits should be the number to remember and that TRD2D is a little bit slower but not that much

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