Add PCH for JET tasks

Heavily speeds up compilation

Author: singiamtel

PWGJE/Tasks/CMakeLists.txt

@@ -148,6 +148,15 @@ if(FastJet_FOUND)
                         SOURCES jetSubstructureDielectronOutput.cxx
                         PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::PWGJECore O2Physics::AnalysisCore
                         COMPONENT_NAME Analysis)
+
+    # PCH for jet substructure HF tasks (makes for much faster compilation)
+    target_precompile_headers(O2Physicsexe-analysis-je-jet-substructure-d0
+        PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/jetSubstructureHFPCH.h")
+    foreach(T IN ITEMS dplus ds dstar lc b0 bplus xictoxipipi dielectron)
+        target_precompile_headers(O2Physicsexe-analysis-je-jet-substructure-${T}
+            REUSE_FROM O2Physicsexe-analysis-je-jet-substructure-d0)
+    endforeach()
+
     o2physics_add_dpl_workflow(jet-fragmentation
                         SOURCES jetFragmentation.cxx
                         PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::PWGJECore O2Physics::AnalysisCore
@@ -359,4 +368,4 @@ if(FastJet_FOUND)
                         SOURCES substructureDebug.cxx
                         PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::PWGJECore O2Physics::AnalysisCore
                         COMPONENT_NAME Analysis)
-endif()
+endif()

PWGJE/Tasks/jetSubstructureHFPCH.h

@@ -0,0 +1,39 @@
+
+// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
+// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
+// All rights not expressly granted are reserved.
+//
+// This software is distributed under the terms of the GNU General Public
+// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
+//
+// In applying this license CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+
+/// \file jetSubstructureHFPCH.h
+/// \brief Precompiled header for jet substructure HF tasks. Reduces compilation time significantly.
+///
+/// \author Sergio Garcia <sergio.garcia@cern.ch>
+
+#ifndef PWGJE_TASKS_JETSUBSTRUCTUREHFPCH_H_
+#define PWGJE_TASKS_JETSUBSTRUCTUREHFPCH_H_
+
+// Heavy PWGJE DataModel headers
+#include "PWGJE/DataModel/Jet.h"
+#include "PWGJE/DataModel/JetSubstructure.h"
+#include "PWGJE/DataModel/JetSubtraction.h"
+
+// Main template header
+#include "PWGJE/Tasks/jetSubstructureHF.h"
+
+// Framework headers
+#include <Framework/ASoA.h>
+#include <Framework/AnalysisTask.h>
+#include <Framework/ConfigContext.h>
+#include <Framework/DataProcessorSpec.h>
+#include <Framework/runDataProcessing.h>
+
+// Standard library
+#include <vector>
+
+#endif // PWGJE_TASKS_JETSUBSTRUCTUREHFPCH_H_