From f4e58d342de63369c5797e8580d5c3f08000b0e7 Mon Sep 17 00:00:00 2001
From: Stuart Douglas <stuart.w.douglas@gmail.com>
Date: Thu, 19 Nov 2015 10:04:17 +1100
Subject: [PATCH] HHH-10301 Don't allocate a new List if it is not required

---
 .../java/org/hibernate/engine/query/spi/HQLQueryPlan.java     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hibernate-core/src/main/java/org/hibernate/engine/query/spi/HQLQueryPlan.java b/hibernate-core/src/main/java/org/hibernate/engine/query/spi/HQLQueryPlan.java
index c84fa8f6e9..1d2612fa19 100644
--- a/hibernate-core/src/main/java/org/hibernate/engine/query/spi/HQLQueryPlan.java
+++ b/hibernate-core/src/main/java/org/hibernate/engine/query/spi/HQLQueryPlan.java
@@ -211,6 +211,10 @@ public class HQLQueryPlan implements Serializable {
 			queryParametersToUse = queryParameters;
 		}
 
+		//fast path to avoid unnecessary allocation and copying
+		if ( translators.length == 1 ) {
+			return translators[0].list( session, queryParametersToUse );
+		}
 		final int guessedResultSize = guessResultSize( rowSelection );
 		final List combinedResults = new ArrayList( guessedResultSize );
 		final IdentitySet distinction;