# HG changeset patch
# User psandoz
# Date 1437777193 25200
# Node ID 7e6f02d5ed41aad1587cf1af97f62dc2a0726388
# Parent  6b8f199268713e3a660f9730d870a6a720daaa20
8062849: Optimize EnumMap.equals
Summary: In the equals method, if the two EnumMaps are a different size return false since they can't be equal.
Reviewed-by: martin, bchristi, rriggs, psandoz
Contributed-by: steve.drach@oracle.com

diff -r 6b8f19926871 -r 7e6f02d5ed41 jdk/src/java.base/share/classes/java/util/EnumMap.java
--- a/jdk/src/java.base/share/classes/java/util/EnumMap.java	Wed Jul 22 14:44:30 2015 -0700
+++ b/jdk/src/java.base/share/classes/java/util/EnumMap.java	Fri Jul 24 15:33:13 2015 -0700
@@ -681,8 +681,11 @@
     }
 
     private boolean equals(EnumMap<?,?> em) {
+        if (em.size != size)
+            return false;
+
         if (em.keyType != keyType)
-            return size == 0 && em.size == 0;
+            return size == 0;
 
         // Key types match, compare each value
         for (int i = 0; i < keyUniverse.length; i++) {