Index: kdevplatform/shell/projectcontroller.cpp
===================================================================
--- kdevplatform/shell/projectcontroller.cpp
+++ kdevplatform/shell/projectcontroller.cpp
@@ -107,6 +107,7 @@
     bool m_cleaningUp; //Temporary flag enabled while destroying the project-controller
     QPointer<ProjectChangesModel> m_changesModel;
     QHash< IProject*, QPointer<KJob> > m_parseJobs; // parse jobs that add files from the project to the background parser.
+    QList<IProject*> m_pendingParseProjectJobs; // project parse jobs waiting to be started
 
     explicit ProjectControllerPrivate( ProjectController* p )
         : m_core(nullptr), model(nullptr), dialog(nullptr), q(p), buildset(nullptr), m_foundProjectFile(false), m_cleaningUp(false)
@@ -897,7 +898,18 @@
     d->m_currentlyOpening.removeAll(project->projectFile().toUrl());
     emit projectOpened( project );
 
-    reparseProject(project);
+    // don't call reparseProject immediately, defer until all currently opening
+    // projects have been imported. Parsing is done in the background but
+    // importing can block the UI so should be as fast as possible.
+    if (d->m_currentlyOpening.isEmpty()) {
+        reparseProject(project);
+        foreach (const auto p, d->m_pendingParseProjectJobs) {
+            reparseProject(p);
+        }
+        d->m_pendingParseProjectJobs.clear();
+    } else {
+        d->m_pendingParseProjectJobs.append(project);
+    }
 }
 
 // helper method for closeProject()