speed-up reading post-pro files in .msh with huge number of time steps...

speed-up reading post-pro files in .msh with huge number of time steps (usually sparse) - for gauthier

Post/PViewDataGModel.cpp

@@ -66,7 +66,9 @@ bool PViewDataGModel::finalize(bool computeMinMax)
 
   // add interpolation data for known element types (this might be
   // overidden later)
+  if(!haveInterpolationMatrices()){
     for(int step = 0; step < getNumTimeSteps(); step++){
+      if(!_steps[step]->getNumData()) continue;
       GModel *m = _steps[step]->getModel();
       for(GModel::eiter it = m->firstEdge(); it != m->lastEdge(); it++){
         if((*it)->lines.size())
@@ -93,6 +95,7 @@ bool PViewDataGModel::finalize(bool computeMinMax)
           _addInterpolationMatricesForElement((*it)->polyhedra[0]);
       }
     }
+  }
 
   return PViewData::finalize();
 }

Post/PViewDataGModelIO.cpp

@@ -52,18 +52,24 @@ bool PViewDataGModel::readMSH(std::string fileName, int fileIndex, FILE *fp,
   Msg::Info("Reading step %d (time %g) partition %d: %d records",
             step, time, partition, numEnt);
 
-  while(step >= (int)_steps.size())
+  while(step >= (int)_steps.size()){
+    if(_steps.empty() || _steps.back()->getNumData())
       _steps.push_back(new stepData<double>(GModel::current(), numComp));
+    else // faster since we avoid computing model bounds
+      _steps.push_back(new stepData<double>(*_steps.back()));
+  }
   
   _steps[step]->setFileName(fileName);
   _steps[step]->setFileIndex(fileIndex);
   _steps[step]->setTime(time);
 
+  /*
   // if we already have maxSteps for this view, return
   int numSteps = 0, maxSteps = 1000000000;
   for(unsigned int i = 0; i < _steps.size(); i++)
     numSteps += _steps[i]->getNumData() ? 1 : 0;
   if(numSteps > maxSteps) return true;
+  */
 
   _steps[step]->resizeData(numEnt);