diff --git a/core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java b/core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java
index ed83ac25..3e3a81f0 100644
--- a/core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java
+++ b/core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java
@@ -397,10 +397,29 @@ public class CuboidRegion extends AbstractRegion implements FlatRegion {
 
     @Override
     public boolean contains(Vector position) {
-        int x = position.getBlockX();
-        int y = position.getBlockY();
-        int z = position.getBlockZ();
-        return x >= this.minX && x <= this.maxX && z >= this.minZ && z <= this.maxZ && y >= this.minY && y <= this.maxY;
+        return contains(position.getBlockX(), position.getBlockY(), position.getBlockZ());
+    }
+
+    private int ly = Integer.MIN_VALUE;
+    private int lz = Integer.MIN_VALUE;
+    private boolean lr, lry, lrz;
+
+    public boolean contains(int x, int y, int z) {
+//        return x >= this.minX && x <= this.maxX && z >= this.minZ && z <= this.maxZ && y >= this.minY && y <= this.maxY;
+        if (z != lz) {
+            lz = z;
+            lrz = z >= this.minZ && z <= this.maxZ;
+            if (y != ly) {
+                ly = y;
+                lry = y >= this.minY && y <= this.maxY;
+            }
+            lr = lrz && lry;
+        } else if (y != ly) {
+            ly = y;
+            lry = y >= this.minY && y <= this.maxY;
+            lr = lrz && lry;
+        }
+        return lr && (x >= this.minX && x <= this.maxX);
     }
 
     @Override