GPU TPC: Remove some obsolete code and track members (leftover from Run 2 by Sergey and totally forgotten), which were wasting performance

Author: davidrohr

GPU/GPUTracking/Merger/GPUTPCGMMergedTrack.h

@@ -41,9 +41,6 @@ class GPUTPCGMMergedTrack
   {
     return mAlpha;
   }
-  GPUd() float LastX() const { return mLastX; }
-  GPUd() float LastY() const { return mLastY; }
-  GPUd() float LastZ() const { return mLastZ; }
   GPUd() bool OK() const { return mFlags & 0x01; }
   GPUd() bool Looper() const { return mFlags & 0x02; }
   GPUd() bool CSide() const { return mFlags & 0x04; }
@@ -55,9 +52,6 @@ class GPUTPCGMMergedTrack
   GPUd() void SetFirstClusterRef(int32_t v) { mFirstClusterRef = v; }
   GPUd() void SetParam(const GPUTPCGMTrackParam& v) { mParam = v; }
   GPUd() void SetAlpha(float v) { mAlpha = v; }
-  GPUd() void SetLastX(float v) { mLastX = v; }
-  GPUd() void SetLastY(float v) { mLastY = v; }
-  GPUd() void SetLastZ(float v) { mLastZ = v; }
   GPUd() void SetOK(bool v)
   {
     if (v) {
@@ -110,9 +104,6 @@ class GPUTPCGMMergedTrack
   gputpcgmmergertypes::GPUTPCOuterParam mOuterParam; //* outer param
 
   float mAlpha;              //* alpha angle
-  float mLastX;              //* outer X
-  float mLastY;              //* outer Y
-  float mLastZ;              //* outer Z
   uint32_t mFirstClusterRef; //* index of the first track cluster in corresponding cluster arrays
   // TODO: Change to 8 bit
   uint32_t mNClusters;       //* number of track clusters

GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx

@@ -1143,26 +1143,7 @@ GPUd() void GPUTPCGMTrackParam::RefitTrack(GPUTPCGMMergedTrack& GPUrestrict() tr
   track.Param() = t;
   track.Alpha() = Alpha;
 
-  if (track.OK()) {
-    int32_t ind = track.FirstClusterRef();
-    const GPUParam& GPUrestrict() param = merger->Param();
-    float alphaa = param.Alpha(merger->Clusters()[ind].sector);
-    float xx, yy, zz;
-    if (merger->Param().par.earlyTpcTransform) {
-      xx = merger->ClustersXYZ()[ind].x;
-      yy = merger->ClustersXYZ()[ind].y;
-      zz = merger->ClustersXYZ()[ind].z - track.Param().GetTZOffset();
-    } else {
-      const ClusterNative& GPUrestrict() cl = merger->GetConstantMem()->ioPtrs.clustersNative->clustersLinear[merger->Clusters()[ind].num];
-      merger->GetConstantMem()->calibObjects.fastTransformHelper->Transform(merger->Clusters()[ind].sector, merger->Clusters()[ind].row, cl.getPad(), cl.getTime(), xx, yy, zz, track.Param().GetTZOffset());
-    }
-    float sinA, cosA;
-    CAMath::SinCos(alphaa - track.Alpha(), sinA, cosA);
-    track.SetLastX(xx * cosA - yy * sinA);
-    track.SetLastY(xx * sinA + yy * cosA);
-    track.SetLastZ(zz);
-    // merger->DebugRefitMergedTrack(track);
-  }
+  // if (track.OK()) merger->DebugRefitMergedTrack(track);
 }
 
 GPUd() void GPUTPCGMTrackParam::Rotate(float alpha)