Cheaper visitKeys for empty tables

neo4j · May 20, 2016 · b669ced · b669ced
1 parent f03bd16
commit b669ced
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diff --git a/...unity/kernel/src/main/java/org/neo4j/kernel/impl/api/KernelTransactionImplementation.java b/...unity/kernel/src/main/java/org/neo4j/kernel/impl/api/KernelTransactionImplementation.java
@@ -432,6 +432,7 @@ private boolean hasDataChanges()
         return hasTxStateWithChanges() && txState.hasDataChanges();
     }
 
+    // Only for test-access
     public TransactionRecordState getTransactionRecordState()
     {
         return recordState;

diff --git a/...c/main/java/org/neo4j/collection/primitive/hopscotch/AbstractLongHopScotchCollection.java b/...c/main/java/org/neo4j/collection/primitive/hopscotch/AbstractLongHopScotchCollection.java
@@ -40,6 +40,11 @@ public PrimitiveLongIterator iterator()
     @Override
     public <E extends Exception> void visitKeys( PrimitiveLongVisitor<E> visitor ) throws E
     {
+        if ( table.isEmpty() )
+        {
+            return;
+        }
+
         int capacity = table.capacity();
         long nullKey = table.nullKey();
         for ( int i = 0; i < capacity; i++ )