Due to perfomance issues at openboard start, in a network-attached storage context, I had to find some (dirty) optimizations in order to counter-balance the huge response time of the directory scans performed when creating the documents tree (very huge in slowest machines (HDD, low CPU, with a thousand documents)). The simplest solution (I found) was to let the opening of metadatas fail, and to prevent any scanning. This implied to introduce the page-count as a metadata. As this issue is not encountered with a standard use of OpenBoard (with local documents), no update operation (of every document) should be necessary out of the described context

src/adaptors/UBMetadataDcSubsetAdaptor.cpp

@@ -125,6 +125,8 @@ void UBMetadataDcSubsetAdaptor::persist(UBDocumentProxy* proxy)
     // introduced in UB 4.4
     xmlWriter.writeTextElement(UBSettings::uniboardDocumentNamespaceUri, "updated-at", UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTimeUtc()));
 
+    xmlWriter.writeTextElement(UBSettings::uniboardDocumentNamespaceUri, "page-count", QString::number(proxy->pageCount()));
+
     xmlWriter.writeEndElement(); //dc:Description
     xmlWriter.writeEndElement(); //RDF
 
@@ -224,6 +226,11 @@ QMap<QString, QVariant> UBMetadataDcSubsetAdaptor::load(QString pPath)
                     metadata.insert(UBSettings::documentUpdatedAt, xml.readElementText());
                     updatedAtFound = true;
                 }
+                else if (xml.name() == "page-count"
+                        && xml.namespaceUri() == UBSettings::uniboardDocumentNamespaceUri)
+                {
+                    metadata.insert(UBSettings::documentPageCount, xml.readElementText());
+                }
                 metadata.insert(UBSettings::documentVersion, docVersion);
             }
 

src/core/UBPersistenceManager.cpp

@@ -164,17 +164,14 @@ void UBPersistenceManager::createDocumentProxiesStructure(const QFileInfoList &c
     {
         QString fullPath = path.absoluteFilePath();
 
-        QDir dir(fullPath);
-
-        if (dir.entryList(QDir::Files | QDir::NoDotAndDotDot).size() > 0)
-        {
         QMap<QString, QVariant> metadatas = UBMetadataDcSubsetAdaptor::load(fullPath);
+
         QString docGroupName = metadatas.value(UBSettings::documentGroupName, QString()).toString();
         QString docName = metadatas.value(UBSettings::documentName, QString()).toString();
 
         if (docName.isEmpty()) {
             qDebug() << "Group name and document name are empty in UBPersistenceManager::createDocumentProxiesStructure()";
-                continue;
+            return;
         }
 
         QModelIndex parentIndex = mDocumentTreeStructureModel->goTo(docGroupName);
@@ -182,12 +179,20 @@ void UBPersistenceManager::createDocumentProxiesStructure(const QFileInfoList &c
             return;
         }
 
-            UBDocumentProxy* docProxy = new UBDocumentProxy(fullPath); // managed in UBDocumentTreeNode
+        UBDocumentProxy* docProxy = new UBDocumentProxy(fullPath, metadatas); // managed in UBDocumentTreeNode
         foreach(QString key, metadatas.keys()) {
             docProxy->setMetaData(key, metadatas.value(key));
         }
 
-            docProxy->setPageCount(sceneCount(docProxy));
+        if (metadatas.contains(UBSettings::documentPageCount))
+        {
+            docProxy->setPageCount(metadatas.value(UBSettings::documentPageCount).toInt());
+        }
+        else
+        {
+            int pageCount = sceneCount(docProxy);
+            docProxy->setPageCount(pageCount);
+        }
 
         if (!interactive)
             mDocumentTreeStructureModel->addDocument(docProxy, parentIndex);
@@ -195,7 +200,6 @@ void UBPersistenceManager::createDocumentProxiesStructure(const QFileInfoList &c
             processInteractiveReplacementDialog(docProxy);
     }
 }
-}
 
 QDialog::DialogCode UBPersistenceManager::processInteractiveReplacementDialog(UBDocumentProxy *pProxy)
 {

src/core/UBSettings.cpp

@@ -60,6 +60,7 @@ QString UBSettings::documentSize = QString("Size");
 QString UBSettings::documentIdentifer = QString("ID");
 QString UBSettings::documentVersion = QString("Version");
 QString UBSettings::documentUpdatedAt = QString("UpdatedAt");
+QString UBSettings::documentPageCount = QString("PageCount");
 QString UBSettings::documentDate = QString("date");
 
 QString UBSettings::trashedDocumentGroupNamePrefix = QString("_Trash:");

src/core/UBSettings.h

@@ -201,6 +201,7 @@ class UBSettings : public QObject
         static QString documentIdentifer;
         static QString documentVersion;
         static QString documentUpdatedAt;
+        static QString documentPageCount;
 
         static QString documentDate;
 

src/document/UBDocumentProxy.cpp

@@ -56,7 +56,6 @@ UBDocumentProxy::UBDocumentProxy(const UBDocumentProxy &rValue) :
     mPageCount = rValue.mPageCount;
 }
 
-
 UBDocumentProxy::UBDocumentProxy(const QString& pPersistancePath)
     : mPageCount(0)
     , mPageDpi(0)
@@ -68,6 +67,17 @@ UBDocumentProxy::UBDocumentProxy(const QString& pPersistancePath)
 }
 
 
+UBDocumentProxy::UBDocumentProxy(const QString& pPersistancePath, QMap<QString, QVariant> metadatas)
+    : mPageCount(0)
+    , mPageDpi(0)
+{
+    init();
+    setPersistencePath(pPersistancePath);
+
+    mMetaDatas = metadatas;
+}
+
+
 void UBDocumentProxy::init()
 {
     setMetaData(UBSettings::documentGroupName, "");

src/document/UBDocumentProxy.h

@@ -49,6 +49,7 @@ class UBDocumentProxy : public QObject
         UBDocumentProxy();
         UBDocumentProxy(const UBDocumentProxy &rValue);
         UBDocumentProxy(const QString& pPersistencePath);
+        UBDocumentProxy(const QString& pPersistencePath, QMap<QString, QVariant> metadatas);
 
         virtual ~UBDocumentProxy();