Reading from the parameter set is expensive!

dune/tectonic/myblockproblem.hh

@@ -264,7 +264,9 @@ class MyBlockProblem<MyConvexProblemTypeTEMPLATE>::IterateObject {
    */
   IterateObject(Dune::ParameterTree const &parset, Bisection const &bisection,
                 MyConvexProblemType const &problem)
-      : parset(parset), problem(problem), bisection(bisection) {}
+      : problem(problem),
+        bisection(bisection),
+        localsteps(parset.get<size_t>("localsolver.steps")) {}
 
 public:
   /** \brief Set the current iterate */
@@ -323,14 +325,11 @@ class MyBlockProblem<MyConvexProblemTypeTEMPLATE>::IterateObject {
                                                 ignore_component);
 
       LocalVectorType correction;
-      Dune::minimise(localJ, ui, parset.get<size_t>("localsolver.steps"),
-                     bisection);
+      Dune::minimise(localJ, ui, localsteps, bisection);
     }
   }
 
 private:
-  Dune::ParameterTree const &parset;
-
   // problem data
   MyConvexProblemType const &problem;
 
@@ -340,6 +339,8 @@ class MyBlockProblem<MyConvexProblemTypeTEMPLATE>::IterateObject {
   // state data for smoothing procedure used by:
   // setIterate, updateIterate, solveLocalProblem
   VectorType u;
+
+  size_t const localsteps;
 };
 
 #endif