ENH: retain a list of solverPerformance in data

- reset when the iteration changes

src/OpenFOAM/meshes/data/data.C

@@ -45,7 +45,8 @@ Foam::data::data(const objectRegistry& obr)
             IOobject::NO_READ,
             IOobject::NO_WRITE
         )
-    )
+    ),
+    prevTimeIndex_(0)
 {
     set("solverPerformance", dictionary());
 }
@@ -65,7 +66,25 @@ void Foam::data::setSolverPerformance
     const lduMatrix::solverPerformance& sp
 ) const
 {
-    const_cast<dictionary&>(solverPerformanceDict()).set(name, sp);
+    dictionary& dict = const_cast<dictionary&>(solverPerformanceDict());
+
+    List<lduMatrix::solverPerformance> perfs;
+
+    if (prevTimeIndex_ != this->time().timeIndex())
+    {
+        // reset solver performance between iterations
+        prevTimeIndex_ = this->time().timeIndex();
+        dict.clear();
+    }
+    else
+    {
+        dict.readIfPresent(name, perfs);
+    }
+
+    // append to list
+    perfs.setSize(perfs.size()+1, sp);
+
+    dict.set(name, perfs);
 }
 
 

src/OpenFOAM/meshes/data/data.H

@@ -54,6 +54,12 @@ class data
 :
     public IOdictionary
 {
+    // Private data
+
+        //- Previously used time-index, used for reset between iterations
+        mutable label prevTimeIndex_;
+
+
     // Private Member Functions
 
         //- Disallow default bitwise copy construct