Performance optimizations for NatTableGraphExplorer

Fine tuned dispose logic to avoid single item removals when whole GE is
disposed.

Node expand was causing unnecessary events, when it tried to expand
non-expandable node.

#692

Change-Id: I06938693af2b28dc51b5d2d5a0269cfde7121fc7
(cherry picked from commit d7ce5ab37a70cf207e3bfe0045c0df3f1fb98415)

diff --git a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/NatTableGraphExplorer.java b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/NatTableGraphExplorer.java
index 37eafd4eb5e965e1e1811fc418576e8a37535b21..9d12fd9b592f70e44bf842819cee245f2b596beb 100644 (file)
--- a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/NatTableGraphExplorer.java
+++ b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/NatTableGraphExplorer.java
@@ -993,11 +993,15 @@ public class NatTableGraphExplorer extends GraphExplorerImplBase implements Grap
        //       we have to remove all references here to reduce memory consumption.
        //      
        //       Proper fix would be to remove references between QueryCache and GENodeQueryManagers.
+       
+       // Clearing explorerContext replaces GECache with dummy implementation, which makes node disposal much faster.
+       explorerContext.close();
        if (rootNode != null) {
-               rootNode.dispose();
+               // Using fastDispose bypasses item removal from nodeMap, which is cleared later. 
+               rootNode.fastDispose();
                rootNode = null;        
         }      
-        explorerContext.dispose();
+       explorerContext.dispose();
         explorerContext = null;
         processors.clear();
         detachPrimitiveProcessors();
@@ -1026,8 +1030,7 @@ public class NatTableGraphExplorer extends GraphExplorerImplBase implements Grap
         }
         resourceManager.dispose();
         resourceManager = null;
-                       
-        contextToNodeMap.clear(); // should be empty at this point.
+        contextToNodeMap.clear();      
         contextToNodeMap = null;
         if (postSelectionProvider != null) {
                postSelectionProvider.dispose();
@@ -2394,6 +2397,13 @@ public class NatTableGraphExplorer extends GraphExplorerImplBase implements Grap
             }
         };
         
+        public void close() {
+               cache.dispose();
+               cache = new DummyCache();
+               scheduleList.clear();
+               autoExpanded.clear();
+        }
+        
         @Override
         public void dispose() {
                cache.dispose();
@@ -2605,6 +2615,7 @@ public class NatTableGraphExplorer extends GraphExplorerImplBase implements Grap
                final HashMap<GECacheKey, IGECacheEntry> entries = new HashMap<GECacheKey, IGECacheEntry>();
                final HashMap<GECacheKey, Set<UIElementReference>> treeReferences = new HashMap<GECacheKey, Set<UIElementReference>>();
                final HashMap<NodeContext, Set<GECacheKey>> keyRefs = new HashMap<NodeContext, Set<GECacheKey>>();
+               private TObjectIntHashMap<NodeContext> references = new TObjectIntHashMap<NodeContext>();
                
                 /**
             * This single instance is used for all get operations from the cache. This
@@ -2731,7 +2742,7 @@ public class NatTableGraphExplorer extends GraphExplorerImplBase implements Grap
                return references.get(context) > 0;
            }
 
-           private TObjectIntHashMap<NodeContext> references = new TObjectIntHashMap<NodeContext>();
+           
            
            @Override
            public void incRef(NodeContext context) {

diff --git a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java
index 4f9273d9120cfd48547986b1fcb630120fe98582..529d02f4916c3745ae9e6a56de4b51c296d0f425 100644 (file)
--- a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java
+++ b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java
@@ -295,6 +295,25 @@ public class TreeNode implements IAdaptable {
                manager = null; 
        }
        
+       /**
+        * Fast dispose is used to wipe the whole tree.
+        * 
+        * ContextToNodeMap is cleared with one command, so we do not need to remove nodes one by one from the map.
+        */
+       public void fastDispose() {
+               if (DEBUG)      System.out.println("dispose " + this);
+               parent = null;
+               for (TreeNode n : children) {
+                       n.fastDispose();
+               }
+               clearCache();
+               children.clear();
+               context = null;
+               explorerContext = null;
+               manager.dispose();
+               manager = null; 
+       }
+       
        private void clearCache() {
                if (explorerContext != null) {
                        GECache2 cache = explorerContext.cache;

diff --git a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/override/TreeLayer2.java b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/override/TreeLayer2.java
index a44944ce6a6792b9dbe36138168f2f4dd4bafdeb..ef09936c4d7e14014efbc2789350046b3634429c 100644 (file)
--- a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/override/TreeLayer2.java
+++ b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/override/TreeLayer2.java
@@ -383,6 +383,8 @@ public class TreeLayer2 extends AbstractRowHideShowLayer2 {
         List<Integer> rowIndexes = this.treeRowModel.expand(parentIndex);
         // Bug 432865: iterating and removing every single item is faster than
         // removeAll()
+        if (rowIndexes.isEmpty())
+               return;
         for (final Integer expandedChildRowIndex : rowIndexes) {
             this.hiddenRowIndexes.remove(expandedChildRowIndex);
         }