src/secp256k1/src/bench.h

   1 /**********************************************************************
   2  * Copyright (c) 2014 Pieter Wuille                                   *
   3  * Distributed under the MIT software license, see the accompanying   *
   4  * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
   5  **********************************************************************/
   6
   7 #ifndef _SECP256K1_BENCH_H_
   8 #define _SECP256K1_BENCH_H_
   9
  10 #include <stdio.h>
  11 #include <math.h>
  12 #include "sys/time.h"
  13
  14 static double gettimedouble(void) {
  15     struct timeval tv;
  16     gettimeofday(&tv, NULL);
  17     return tv.tv_usec * 0.000001 + tv.tv_sec;
  18 }
  19
  20 void run_benchmark(void (*benchmark)(void*), void (*setup)(void*), void (*teardown)(void*), void* data, int count, int iter) {
  21     double min = HUGE_VAL;
  22     double sum = 0.0;
  23     double max = 0.0;
  24     for (int i = 0; i < count; i++) {
  25         if (setup) setup(data);
  26         double begin = gettimedouble();
  27         benchmark(data);
  28         double total = gettimedouble() - begin;
  29         if (teardown) teardown(data);
  30         if (total < min) min = total;
  31         if (total > max) max = total;
  32         sum += total;
  33     }
  34     printf("min %.3fus / avg %.3fus / max %.3fus\n", min * 1000000.0 / iter, (sum / count) * 1000000.0 / iter, max * 1000000.0 / iter);
  35 }
  36
  37 #endif