throws IOException
throws Exception
    public void xestSpeedCompareNThrough() throws IOException    {        final int n = 5;        for (Iterator it = images.values().iterator(); it.hasNext();)        {            final Stats stats = new Stats();            Image i = (Image) it.next();            for (int j = 0; j < n; j++)            {                i.eachPlane(new PlaneCallback()                {                    void each(Image i, int z, int c, int t, int counter)                            throws IOException                    {                        compare(stats,i,z,c,t);                    }                });            }            log.info(stats);        }    }