--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java	Tue May 01 07:40:41 2018 -0400
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java	Tue May 01 06:18:48 2018 -0700
@@ -6389,5 +6389,8 @@
         // Reduce the risk of rare disastrous classloading in first call to
         // LockSupport.park: https://bugs.openjdk.java.net/browse/JDK-8074773
         Class<?> ensureLoaded = LockSupport.class;
+
+        // Eager class load observed to help JIT during startup
+        ensureLoaded = ReservationNode.class;
     }
 }