Tiger introduces a cache of commonly used wrapper instances, and a static
factory for returning them.  The language requires caching Integers in the
range -128 to 127.  But this cache is not used in the reflection
implementation, resulting in much unnecessary object creation when running
reflective code.

Here is a test case that illustrates the problem:

/////////////////////////////////////////////////////////
import java.lang.reflect.*;
class Main {
    public static int f() { return 0; }
    public static void main(String[] args) throws Exception {
        Method m = Main.class.getMethod("f");
        Object o1 = m.invoke(null);
        Object o2 = m.invoke(null);
        if (o1 != o2)
            throw new Error(System.identityHashCode(o1) +
                            " " + System.identityHashCode(o2));
    }
}