/*
     This file is part of GNUnet.
     (C) 2002, 2003, 2004, 2006 Christian Grothoff (and other contributing authors)

     GNUnet is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published
     by the Free Software Foundation; either version 2, or (at your
     option) any later version.

     GNUnet is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/

/**
 * @author Christian Grothoff
 * @file util/perf_crypto_hash.c
 * @brief measure performance of hash function
 */
#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_crypto_lib.h"
#include "gnunet_time_lib.h"
#include <gauger.h>

static void
perfHash ()
{
  GNUNET_HashCode hc1;
  GNUNET_HashCode hc2;
  GNUNET_HashCode hc3;
  int i;
  char *buf;

  buf = GNUNET_malloc (1024 * 64);
  memset (buf, 1, 1024 * 64);
  GNUNET_CRYPTO_hash ("foo", 3, &hc1);
  for (i = 0; i < 1024; i++)
    {
      GNUNET_CRYPTO_hash (&hc1, sizeof (GNUNET_HashCode), &hc2);
      GNUNET_CRYPTO_hash (&hc2, sizeof (GNUNET_HashCode), &hc1);
      GNUNET_CRYPTO_hash (buf, 1024 * 64, &hc3);
    }
  GNUNET_free (buf);
}

int
main (int argc, char *argv[])
{
  struct GNUNET_TIME_Absolute start;

  start = GNUNET_TIME_absolute_get ();
  perfHash ();
  printf ("Hash perf took %llu ms\n",
          (unsigned long long)
          GNUNET_TIME_absolute_get_duration (start).rel_value);
  GAUGER ("UTIL", "Cryptographic hashing", 1024 * 64 * 1024 / (1+GNUNET_TIME_absolute_get_duration (start).rel_value), "kb/s");
  return 0;
}

/* end of hashperf.c */