Fixes for report #63583: High CPU time spent in TMath::Erf

[u/mrichter/AliRoot.git] / ITS / AliITSsimulationSSD.cxx

diff --git a/ITS/AliITSsimulationSSD.cxx b/ITS/AliITSsimulationSSD.cxx
index e4293e2ed887065233ca0bf282094f9a4607e0f7..ae473468b46aa202dde3bc4f231e472ff77d7b88 100644 (file)
--- a/ITS/AliITSsimulationSSD.cxx
+++ b/ITS/AliITSsimulationSSD.cxx
@@ -35,7 +35,7 @@
 #include "AliITSsimulationSSD.h"
 #include "AliITSTableSSD.h"
 #include <TF1.h>
-
+#include "AliMathBase.h"
 
 ClassImp(AliITSsimulationSSD)
 ////////////////////////////////////////////////////////////////////////
@@ -518,7 +518,7 @@ Float_t AliITSsimulationSSD::F(Float_t av, Float_t x, Float_t s) {
     Float_t sigm2 = sqrt2*s;
     Float_t integral;
 
-    integral = 0.5 * TMath::Erf( (x - av) / sigm2);
+    integral = 0.5 * AliMathBase::ErfFast( (x - av) / sigm2);
     return integral;
 }
 //______________________________________________________________________