Adding in wildcard index for perf testing

Author: PicoCreator

src/main/java/picoded/dstack/mongodb/MongoDB_DataObjectMap.java

@@ -98,7 +98,13 @@ public void systemSetup() {
 		opt = opt.name("_oid");
 		collection.createIndex(Indexes.ascending("_oid"), opt);
 
-		// @TODO consider wildcard index
+		// Wildcard indexing
+		//
+		// This helps improve general performance for arbitary data
+		// at a huge cost of write performance
+		opt = new IndexOptions();
+		opt = opt.name("wildcard");
+		collection.createIndex(Indexes.ascending("$**"), opt);
 	}
 
 	/**