diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java b/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java
index 6162c221a..ee76a4280 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java
@@ -63,7 +63,7 @@
  *            type of subclass of ObjectId that will be stored in the map.
  */
 public class ObjectIdSubclassMap<V extends ObjectId> implements Iterable<V> {
-	private static final int INITIAL_TABLE_SIZE = 32;
+	private static final int INITIAL_TABLE_SIZE = 2048;
 
 	private int size;