Stopped xAODWriterAlg from re-creating the output object type names on every event.

It was wasteful to call SG::normalizedTypeinfoName(...) as many times as the code did.
Now the algorithm just caches the type names of the written objects. Trading a little
bit of memory for less CPU cycles.


Former-commit-id: 7602a2433b08be69caa04fe10a4f17d734e515a2

PhysicsAnalysis/Algorithms/StandaloneAnalysisAlgorithms/Root/xAODWriterAlg.cxx

@@ -94,8 +94,7 @@ namespace CP {
          }
 
          // Record it to the output for the current event.
-         ANA_CHECK( m_event.record( const_cast< void* >( obj ),
-                                    SG::normalizedTypeinfoName( *( item.type ) ),
+         ANA_CHECK( m_event.record( const_cast< void* >( obj ), item.typeName,
                                     item.name, m_basketSize, m_splitLevel ) );
       }
 
@@ -174,6 +173,7 @@ namespace CP {
                               << itemMatch[ 1 ] << "\"" );
                return StatusCode::FAILURE;
             }
+            item.typeName = SG::normalizedTypeinfoName( *( item.type ) );
 
             // Check if the item is available.
             static const bool SILENT = true;

PhysicsAnalysis/Algorithms/StandaloneAnalysisAlgorithms/StandaloneAnalysisAlgorithms/xAODWriterAlg.h

@@ -70,6 +70,8 @@ namespace CP {
          std::string name;
          /// Type of the written object
          const std::type_info* type;
+         /// Type name of the written object
+         std::string typeName;
       }; // struct Item
 
       /// Object to write the output file with