Fixed storing every residual in solvePerformance (increasing solverPerformance list size). Significant influence on speed when running with large number of correctors (i.e. solidMechanics)

src/foam/matrices/solution/solution.C

@@ -442,8 +442,18 @@ void Foam::solution::setSolverPerformance
         solverPerformance_.readIfPresent(name, perfs);
     }
 
-    // Append to list
+    // Only the first iteration and the current iteration residuals are
-    perfs.setSize(perfs.size() + 1, sp);
+    // required, so the current iteration residual replaces the previous one and
+    // only the first iteration is always present, VS 2017-11-27
+    if (perfs.size() < 2)
+    {
+        // Append to list
+        perfs.setSize(perfs.size() + 1, sp);
+    }
+    else
+    {
+        perfs.last() = sp;
+    }
 
     solverPerformance_.set(name, perfs);
 }