diff --git a/ApplicationLibCode/Application/Tools/RiaFilePathTools.cpp b/ApplicationLibCode/Application/Tools/RiaFilePathTools.cpp
index 49f17ed845..9cb625acd1 100644
--- a/ApplicationLibCode/Application/Tools/RiaFilePathTools.cpp
+++ b/ApplicationLibCode/Application/Tools/RiaFilePathTools.cpp
@@ -204,9 +204,12 @@ QStringList RiaFilePathTools::splitPathIntoComponents( const QString& inputPath,
 {
     auto path = QDir::cleanPath( inputPath );
 
-    QStringList components;
+    auto indexOfLastSeparator = path.lastIndexOf( separator() );
+    auto indexOfDrive         = path.indexOf( ':' );
 
-    QDir dir( path );
+    QString pathWithoutDrive = path.mid( indexOfDrive + 1, indexOfLastSeparator - ( indexOfDrive + 1 ) );
+
+    QStringList components = RiaTextStringTools::splitSkipEmptyParts( pathWithoutDrive, separator() );
 
     QFileInfo fileInfo( path );
 
@@ -214,18 +217,14 @@ QStringList RiaFilePathTools::splitPathIntoComponents( const QString& inputPath,
     {
         QString extension = fileInfo.completeSuffix();
         path              = path.replace( QString( ".%1" ).arg( extension ), "" );
-        components.push_front( extension );
-        components.push_front( fileInfo.baseName() );
+        components.push_back( extension );
+        components.push_back( fileInfo.baseName() );
     }
     else
     {
         components.push_back( fileInfo.fileName() );
     }
 
-    while ( dir.cdUp() )
-    {
-        components.push_front( dir.dirName() );
-    }
     return components;
 }
 
@@ -330,16 +329,10 @@ std::map<QString, QStringList> RiaFilePathTools::keyPathComponentsForEachFilePat
 {
     std::map<QString, QStringList> allComponents;
 
-    std::multiset<QString> allPathComponents;
     for ( auto fileName : filePaths )
     {
         QStringList pathComponentsForFile = splitPathIntoComponents( fileName, true );
         allComponents[fileName]           = pathComponentsForFile;
-
-        for ( auto pathComponent : pathComponentsForFile )
-        {
-            allPathComponents.insert( pathComponent );
-        }
     }
 
     auto topNode = std::unique_ptr<PathNode>( new PathNode( "", nullptr ) );
diff --git a/ApplicationLibCode/FileInterface/RifOpmCommonSummary.cpp b/ApplicationLibCode/FileInterface/RifOpmCommonSummary.cpp
index 6b411262b9..bfad38a75b 100644
--- a/ApplicationLibCode/FileInterface/RifOpmCommonSummary.cpp
+++ b/ApplicationLibCode/FileInterface/RifOpmCommonSummary.cpp
@@ -398,9 +398,9 @@ std::pair<std::set<RifEclipseSummaryAddress>, std::map<RifEclipseSummaryAddress,
 
 #pragma omp parallel
     {
-        std::set<RifEclipseSummaryAddress>              threadAddresses;
-        std::map<RifEclipseSummaryAddress, std::string> threadAddressToKeywordMap;
-        std::vector<std::string>                        threadInvalidKeywords;
+        std::vector<RifEclipseSummaryAddress>                         threadAddresses;
+        std::vector<std::pair<RifEclipseSummaryAddress, std::string>> threadAddressToKeywordMap;
+        std::vector<std::string>                                      threadInvalidKeywords;
 
 #pragma omp for
         for ( int index = 0; index < (int)keywords.size(); index++ )
@@ -418,8 +418,8 @@ std::pair<std::set<RifEclipseSummaryAddress>, std::map<RifEclipseSummaryAddress,
 
             if ( eclAdr.isValid() )
             {
-                threadAddresses.insert( eclAdr );
-                threadAddressToKeywordMap[eclAdr] = keyword;
+                threadAddresses.emplace_back( eclAdr );
+                threadAddressToKeywordMap.emplace_back( std::make_pair( eclAdr, keyword ) );
             }
         }
 
diff --git a/ApplicationLibCode/ProjectDataModel/RimSummaryCalculationCollection.cpp b/ApplicationLibCode/ProjectDataModel/RimSummaryCalculationCollection.cpp
index f2de3ba444..75d01c6cc4 100644
--- a/ApplicationLibCode/ProjectDataModel/RimSummaryCalculationCollection.cpp
+++ b/ApplicationLibCode/ProjectDataModel/RimSummaryCalculationCollection.cpp
@@ -58,6 +58,8 @@ void RimSummaryCalculationCollection::updateDataDependingOnCalculations()
     {
         if ( !summaryCase ) continue;
 
+        if ( !summaryCase->showRealizationDataSources() ) continue;
+
         if ( auto reader = summaryCase->summaryReader() )
         {
             reader->buildMetaData();
@@ -93,11 +95,3 @@ void RimSummaryCalculationCollection::rebuildCaseMetaData()
     ensureValidCalculationIds();
     updateDataDependingOnCalculations();
 }
-
-//--------------------------------------------------------------------------------------------------
-///
-//--------------------------------------------------------------------------------------------------
-void RimSummaryCalculationCollection::initAfterRead()
-{
-    rebuildCaseMetaData();
-}
diff --git a/ApplicationLibCode/ProjectDataModel/RimSummaryCalculationCollection.h b/ApplicationLibCode/ProjectDataModel/RimSummaryCalculationCollection.h
index e4953189ba..eea4c734c5 100644
--- a/ApplicationLibCode/ProjectDataModel/RimSummaryCalculationCollection.h
+++ b/ApplicationLibCode/ProjectDataModel/RimSummaryCalculationCollection.h
@@ -43,5 +43,4 @@ class RimSummaryCalculationCollection : public RimUserDefinedCalculationCollecti
 
 private:
     void updateDataDependingOnCalculations();
-    void initAfterRead() override;
 };
diff --git a/ApplicationLibCode/ProjectDataModel/Summary/RimFileSummaryCase.cpp b/ApplicationLibCode/ProjectDataModel/Summary/RimFileSummaryCase.cpp
index 550fb6bf63..e4815a8c2b 100644
--- a/ApplicationLibCode/ProjectDataModel/Summary/RimFileSummaryCase.cpp
+++ b/ApplicationLibCode/ProjectDataModel/Summary/RimFileSummaryCase.cpp
@@ -20,14 +20,12 @@
 
 #include "RiaApplication.h"
 #include "RiaLogging.h"
-
-#include "RicfCommandObject.h"
+#include "RiaPreferencesSummary.h"
 
 #include "RifEclipseSummaryTools.h"
 #include "RifMultipleSummaryReaders.h"
 #include "RifOpmCommonSummary.h"
 #include "RifProjectSummaryDataWriter.h"
-#include "RifReaderEclipseRft.h"
 #include "RifReaderEclipseSummary.h"
 #include "RifReaderOpmRft.h"
 #include "RifSummaryReaderMultipleFiles.h"
@@ -36,7 +34,6 @@
 #include "RimProject.h"
 #include "RimRftCase.h"
 #include "RimSummaryCalculationCollection.h"
-#include "RimTools.h"
 
 #include "cafPdmFieldScriptingCapability.h"
 #include "cafPdmObjectScriptingCapability.h"
@@ -102,8 +99,18 @@ QString RimFileSummaryCase::caseName() const
 //--------------------------------------------------------------------------------------------------
 void RimFileSummaryCase::createSummaryReaderInterfaceThreadSafe( RiaThreadSafeLogger* threadSafeLogger )
 {
-    m_fileSummaryReader =
-        RimFileSummaryCase::findRelatedFilesAndCreateReader( summaryHeaderFilename(), m_includeRestartFiles, threadSafeLogger );
+    bool lookForRestartFiles = false;
+
+    if ( RiaPreferencesSummary::current()->summaryDataReader() == RiaPreferencesSummary::SummaryReaderMode::LIBECL )
+    {
+        // It is only the libecl reader that requires manual search for referenced restart files
+        // opm-common reader handles restart files internally based on m_includeRestartFiles in RifOpmCommonEclipseSummary::openFileReader
+        //
+        // The performance of the function looking for restart files is bad, and will affect the performance significantly
+        lookForRestartFiles = m_includeRestartFiles;
+    }
+
+    m_fileSummaryReader = RimFileSummaryCase::findRelatedFilesAndCreateReader( summaryHeaderFilename(), lookForRestartFiles, threadSafeLogger );
 
     m_multiSummaryReader = new RifMultipleSummaryReaders;
     m_multiSummaryReader->addReader( m_fileSummaryReader.p() );
@@ -159,10 +166,10 @@ void RimFileSummaryCase::createRftReaderInterface()
 ///
 //--------------------------------------------------------------------------------------------------
 RifSummaryReaderInterface* RimFileSummaryCase::findRelatedFilesAndCreateReader( const QString&       headerFileName,
-                                                                                bool                 includeRestartFiles,
+                                                                                bool                 lookForRestartFiles,
                                                                                 RiaThreadSafeLogger* threadSafeLogger )
 {
-    if ( includeRestartFiles )
+    if ( lookForRestartFiles )
     {
         std::vector<QString>            warnings;
         std::vector<RifRestartFileInfo> restartFileInfos = RifEclipseSummaryTools::getRestartFiles( headerFileName, warnings );
diff --git a/ApplicationLibCode/ProjectDataModel/Summary/RimFileSummaryCase.h b/ApplicationLibCode/ProjectDataModel/Summary/RimFileSummaryCase.h
index 927e6c3a78..dacc7e5670 100644
--- a/ApplicationLibCode/ProjectDataModel/Summary/RimFileSummaryCase.h
+++ b/ApplicationLibCode/ProjectDataModel/Summary/RimFileSummaryCase.h
@@ -61,7 +61,7 @@ class RimFileSummaryCase : public RimSummaryCase
     void onProjectBeingSaved();
 
     static RifSummaryReaderInterface*
-        findRelatedFilesAndCreateReader( const QString& headerFileName, bool includeRestartFiles, RiaThreadSafeLogger* threadSafeLogger );
+        findRelatedFilesAndCreateReader( const QString& headerFileName, bool lookForRestartFiles, RiaThreadSafeLogger* threadSafeLogger );
 
 protected:
     void defineEditorAttribute( const caf::PdmFieldHandle* field, QString uiConfigName, caf::PdmUiEditorAttribute* attribute ) override;
diff --git a/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCase.cpp b/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCase.cpp
index 7171f50e21..0f89af928b 100644
--- a/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCase.cpp
+++ b/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCase.cpp
@@ -406,6 +406,9 @@ void RimSummaryCase::refreshMetaData()
 //--------------------------------------------------------------------------------------------------
 void RimSummaryCase::onCalculationUpdated()
 {
+    // NB! Performance critical method
+    if ( !m_showSubNodesInTree ) return;
+
     // Delete all calculated address objects
     m_dataVectorFolders->deleteCalculatedObjects();
 
diff --git a/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCaseCollection.cpp b/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCaseCollection.cpp
index 6e5fc541e7..762aec578a 100644
--- a/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCaseCollection.cpp
+++ b/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCaseCollection.cpp
@@ -248,7 +248,9 @@ void RimSummaryCaseCollection::ensureNameIsUpdated()
         RiaEnsembleNameTools::EnsembleGroupingMode groupingMode = RiaEnsembleNameTools::EnsembleGroupingMode::FMU_FOLDER_STRUCTURE;
 
         QString ensembleName = RiaEnsembleNameTools::findSuitableEnsembleName( fileNames, groupingMode );
-        m_name               = ensembleName;
+        if ( m_name == ensembleName ) return;
+
+        m_name = ensembleName;
         caseNameChanged.send();
     }
 }
diff --git a/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCaseMainCollection.cpp b/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCaseMainCollection.cpp
index bd193480c2..a3e17a81bd 100644
--- a/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCaseMainCollection.cpp
+++ b/ApplicationLibCode/ProjectDataModel/Summary/RimSummaryCaseMainCollection.cpp
@@ -460,6 +460,7 @@ void RimSummaryCaseMainCollection::loadFileSummaryCaseData( std::vector<RimFileS
             if ( fileSummaryCase )
             {
                 fileSummaryCase->createSummaryReaderInterfaceThreadSafe( &threadSafeLogger );
+                addCaseRealizationParametersIfFound( *fileSummaryCase, fileSummaryCase->summaryHeaderFilename() );
             }
 
             progInfo.setProgress( cIdx );
@@ -482,7 +483,6 @@ void RimSummaryCaseMainCollection::loadFileSummaryCaseData( std::vector<RimFileS
         if ( fileSummaryCase )
         {
             fileSummaryCase->createRftReaderInterface();
-            addCaseRealizationParametersIfFound( *fileSummaryCase, fileSummaryCase->summaryHeaderFilename() );
         }
     }
 }
@@ -648,9 +648,13 @@ void RimSummaryCaseMainCollection::updateAutoShortName()
     //
     // https://github.com/OPM/ResInsight/issues/7438
 
-    for ( auto s : allSummaryCases() )
+    auto sumCases = allSummaryCases();
+
+#pragma omp parallel for
+    for ( int cIdx = 0; cIdx < static_cast<int>( sumCases.size() ); ++cIdx )
     {
-        s->updateAutoShortName();
+        auto sumCase = sumCases[cIdx];
+        sumCase->updateAutoShortName();
     }
 }
 
diff --git a/ApplicationLibCode/UnitTests/RiaFilePathTools-Test.cpp b/ApplicationLibCode/UnitTests/RiaFilePathTools-Test.cpp
index 0b311c00da..96654aeb0b 100644
--- a/ApplicationLibCode/UnitTests/RiaFilePathTools-Test.cpp
+++ b/ApplicationLibCode/UnitTests/RiaFilePathTools-Test.cpp
@@ -1,5 +1,6 @@
 #include "gtest/gtest.h"
 
+#include "RiaEnsembleNameTools.h"
 #include "RiaFilePathTools.h"
 
 #include <iostream>
@@ -112,3 +113,90 @@ TEST( RiaFilePathTools, removeDuplicatePathSeparators )
         EXPECT_STRCASEEQ( expectedPath.toLatin1(), resultRootPath.toLatin1() );
     }
 }
+
+//--------------------------------------------------------------------------------------------------
+TEST( RiaFilePathTools, splitIntoComponets )
+{
+    {
+        QString testPath( "e:/models/from_equinor_sftp/drogon3d_ahm/realization-0/iter-3/eclipse/model/DROGON-0.SMSPEC" );
+
+        auto words = RiaFilePathTools::splitPathIntoComponents( testPath );
+
+        EXPECT_EQ( 8, words.size() );
+
+        EXPECT_EQ( QString( "models" ), words[0] );
+        EXPECT_EQ( QString( "from_equinor_sftp" ), words[1] );
+        EXPECT_EQ( QString( "drogon3d_ahm" ), words[2] );
+        EXPECT_EQ( QString( "realization-0" ), words[3] );
+        EXPECT_EQ( QString( "iter-3" ), words[4] );
+        EXPECT_EQ( QString( "eclipse" ), words[5] );
+        EXPECT_EQ( QString( "model" ), words[6] );
+        EXPECT_EQ( QString( "DROGON-0.SMSPEC" ), words[7] );
+    }
+
+    {
+        QString testPath( "/home/builder/models/realization-0/iter-3/eclipse/model/DROGON-0.SMSPEC" );
+
+        auto words = RiaFilePathTools::splitPathIntoComponents( testPath );
+
+        EXPECT_EQ( 8, words.size() );
+
+        EXPECT_EQ( QString( "home" ), words[0] );
+        EXPECT_EQ( QString( "builder" ), words[1] );
+        EXPECT_EQ( QString( "models" ), words[2] );
+        EXPECT_EQ( QString( "realization-0" ), words[3] );
+        EXPECT_EQ( QString( "iter-3" ), words[4] );
+        EXPECT_EQ( QString( "eclipse" ), words[5] );
+        EXPECT_EQ( QString( "model" ), words[6] );
+        EXPECT_EQ( QString( "DROGON-0.SMSPEC" ), words[7] );
+    }
+}
+
+//--------------------------------------------------------------------------------------------------
+TEST( RiaFilePathTools, EnsembleName )
+{
+    {
+        QString     testPath1( "e:/models/from_equinor_sftp/drogon3d_ahm/realization-0/iter-3/eclipse/model/DROGON-0.SMSPEC" );
+        QString     testPath2( "e:/models/from_equinor_sftp/drogon3d_ahm/realization-1/iter-3/eclipse/model/DROGON-1.SMSPEC" );
+        QStringList allPaths = { testPath1, testPath2 };
+
+        auto ensembleName =
+            RiaEnsembleNameTools::findSuitableEnsembleName( allPaths, RiaEnsembleNameTools::EnsembleGroupingMode::FMU_FOLDER_STRUCTURE );
+
+        EXPECT_EQ( QString( "iter-3" ), ensembleName );
+    }
+}
+
+//--------------------------------------------------------------------------------------------------
+TEST( RiaFilePathTools, RealizationName )
+{
+    {
+        QString     testPath0( "e:/models/from_equinor_sftp/drogon3d_ahm/realization-0/iter-3/eclipse/model/DROGON-0.SMSPEC" );
+        QString     testPath1( "e:/models/from_equinor_sftp/drogon3d_ahm/realization-1/iter-3/eclipse/model/DROGON-1.SMSPEC" );
+        QStringList allPaths = { testPath0, testPath1 };
+
+        QString fileName = "DROGON-0.SMSPEC";
+
+        auto name = RiaEnsembleNameTools::uniqueShortName( testPath1, allPaths, fileName );
+
+        EXPECT_EQ( QString( "real-1" ), name );
+    }
+}
+
+//--------------------------------------------------------------------------------------------------
+TEST( RiaFilePathTools, keyPathComponentsForEachFilePath )
+{
+    {
+        QString     testPath0( "e:/models/from_equinor_sftp/drogon3d_ahm/realization-0/iter-3/eclipse/model/DROGON-0.SMSPEC" );
+        QString     testPath1( "e:/models/from_equinor_sftp/drogon3d_ahm/realization-1/iter-3/eclipse/model/DROGON-1.SMSPEC" );
+        QStringList allPaths = { testPath0, testPath1 };
+
+        auto keyComponents = RiaFilePathTools::keyPathComponentsForEachFilePath( allPaths );
+
+        auto test0 = keyComponents[testPath0];
+        EXPECT_EQ( QString( "realization-0" ), test0.front() );
+
+        auto test1 = keyComponents[testPath1];
+        EXPECT_EQ( QString( "realization-1" ), test1.front() );
+    }
+}