diff --git a/src/main/java/com/sk89q/worldguard/bukkit/BukkitPlayer.java b/src/main/java/com/sk89q/worldguard/bukkit/BukkitPlayer.java
index 416317b6..07c96337 100644
--- a/src/main/java/com/sk89q/worldguard/bukkit/BukkitPlayer.java
+++ b/src/main/java/com/sk89q/worldguard/bukkit/BukkitPlayer.java
@@ -33,18 +33,21 @@ public class BukkitPlayer extends LocalPlayer {
 
     private final WorldGuardPlugin plugin;
     private final Player player;
-    
+    private final String name;
+
     public BukkitPlayer(WorldGuardPlugin plugin, Player player) {
         checkNotNull(plugin);
         checkNotNull(player);
 
         this.plugin = plugin;
         this.player = player;
+        // getName() takes longer than before in newer versions of Minecraft
+        this.name = player.getName();
     }
 
     @Override
     public String getName() {
-        return player.getName();
+        return name;
     }
 
     @Override
diff --git a/src/main/java/com/sk89q/worldguard/protection/ApplicableRegionSet.java b/src/main/java/com/sk89q/worldguard/protection/ApplicableRegionSet.java
index 6f6d9b7d..7b9e61cd 100644
--- a/src/main/java/com/sk89q/worldguard/protection/ApplicableRegionSet.java
+++ b/src/main/java/com/sk89q/worldguard/protection/ApplicableRegionSet.java
@@ -19,7 +19,6 @@
 
 package com.sk89q.worldguard.protection;
 
-import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ObjectArrays;
 import com.sk89q.worldguard.LocalPlayer;
 import com.sk89q.worldguard.protection.association.RegionAssociable;
@@ -35,6 +34,7 @@
 import javax.annotation.Nullable;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
@@ -346,7 +346,7 @@ public int size() {
      * @return a set of regions
      */
     public Set<ProtectedRegion> getRegions() {
-        return ImmutableSet.copyOf(applicable);
+        return new HashSet<ProtectedRegion>(applicable);
     }
 
     @Override
diff --git a/src/main/java/com/sk89q/worldguard/protection/FlagValueCalculator.java b/src/main/java/com/sk89q/worldguard/protection/FlagValueCalculator.java
index 660313c7..0a0e5dad 100644
--- a/src/main/java/com/sk89q/worldguard/protection/FlagValueCalculator.java
+++ b/src/main/java/com/sk89q/worldguard/protection/FlagValueCalculator.java
@@ -31,6 +31,7 @@
 import com.sk89q.worldguard.protection.regions.ProtectedRegion;
 
 import javax.annotation.Nullable;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -55,6 +56,7 @@ public class FlagValueCalculator {
     private final List<ProtectedRegion> regions;
     @Nullable
     private final ProtectedRegion globalRegion;
+    private final Iterable<ProtectedRegion> applicable;
 
     /**
      * Create a new instance.
@@ -67,6 +69,12 @@ public FlagValueCalculator(List<ProtectedRegion> regions, @Nullable ProtectedReg
 
         this.regions = regions;
         this.globalRegion = globalRegion;
+
+        if (globalRegion != null) {
+            applicable = Iterables.concat(regions, Arrays.asList(globalRegion));
+        } else {
+            applicable = regions;
+        }
     }
 
     /**
@@ -76,11 +84,7 @@ public FlagValueCalculator(List<ProtectedRegion> regions, @Nullable ProtectedReg
      * @return an iterable
      */
     private Iterable<ProtectedRegion> getApplicable() {
-        if (globalRegion != null) {
-            return Iterables.concat(regions, ImmutableList.of(globalRegion));
-        } else {
-            return regions;
-        }
+        return applicable;
     }
 
     /**
diff --git a/src/main/java/com/sk89q/worldguard/protection/flags/RegionGroup.java b/src/main/java/com/sk89q/worldguard/protection/flags/RegionGroup.java
index b1f1598f..5a06938e 100644
--- a/src/main/java/com/sk89q/worldguard/protection/flags/RegionGroup.java
+++ b/src/main/java/com/sk89q/worldguard/protection/flags/RegionGroup.java
@@ -19,9 +19,10 @@
 
 package com.sk89q.worldguard.protection.flags;
 
-import com.google.common.collect.ImmutableSet;
 import com.sk89q.worldguard.domains.Association;
 
+import java.util.Arrays;
+import java.util.EnumSet;
 import java.util.Set;
 
 import static com.google.common.base.Preconditions.checkNotNull;
@@ -41,7 +42,7 @@ public enum RegionGroup {
     private final Set<Association> contained;
 
     RegionGroup(Association... association) {
-        this.contained = ImmutableSet.copyOf(association);
+        this.contained = association.length > 0 ? EnumSet.copyOf(Arrays.asList(association)) : EnumSet.noneOf(Association.class);
     }
 
     /**