More efficient and actually works. Yay!

src/main/resources/pythagoras/util/Platform.java

@@ -4,6 +4,8 @@
 
 package pythagoras.util;
 
+import java.util.Arrays;
+
 /**
  * A platform instance that's used when running in GWT. Note that this is copied over top of the
  * JDK implementation in the pythagoras.jar file, so this is never actually compiled to bytecode.
@@ -28,36 +30,28 @@ public class Platform
     /**
      * Clones the supplied array of bytes.
      */
-    public static byte[] clone (byte[] values) {
-        byte[] nvalues = new byte[values.length];
-        System.arraycopy(values, 0, nvalues, 0, values.length);
-        return nvalues;
-    }
+    public static native byte[] clone (byte[] values) /*-{
+        return values.slice(0);
+    }-*/;
 
     /**
      * Clones the supplied array of ints.
      */
-    public static int[] clone (int[] values) {
-        int[] nvalues = new int[values.length];
-        System.arraycopy(values, 0, nvalues, 0, values.length);
-        return nvalues;
-    }
+    public static native int[] clone (int[] values) /*-{
+        return values.slice(0);
+    }-*/;
 
     /**
      * Clones the supplied array of floats.
      */
-    public static float[] clone (float[] values) {
-        float[] nvalues = new float[values.length];
-        System.arraycopy(values, 0, nvalues, 0, values.length);
-        return nvalues;
-    }
+    public static native float[] clone (float[] values) /*-{
+        return values.slice(0);
+    }-*/;
 
     /**
      * Clones the supplied array of doubles.
      */
-    public static double[] clone (double[] values) {
-        double[] nvalues = new double[values.length];
-        System.arraycopy(values, 0, nvalues, 0, values.length);
-        return nvalues;
-    }
+    public static native double[] clone (double[] values) /*-{
+        return values.slice(0);
+    }-*/;
 }