mirror of
https://gitlab.com/libeigen/eigen.git
synced 2024-12-21 07:19:46 +08:00
104 lines
2.4 KiB
C++
104 lines
2.4 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
|
|
// for linear algebra.
|
|
//
|
|
// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
|
|
// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
|
|
//
|
|
// Eigen is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 3 of the License, or (at your option) any later version.
|
|
//
|
|
// Alternatively, 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 of
|
|
// the License, or (at your option) any later version.
|
|
//
|
|
// Eigen 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 Lesser General Public License or the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License and a copy of the GNU General Public License along with
|
|
// Eigen. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
#ifndef EIGEN_BENCH_TIMER_H
|
|
#define EIGEN_BENCH_TIMER_H
|
|
|
|
#ifndef WIN32
|
|
#include <sys/time.h>
|
|
#include <unistd.h>
|
|
#else
|
|
#define NOMINMAX
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
#include <cstdlib>
|
|
#include <numeric>
|
|
|
|
namespace Eigen
|
|
{
|
|
|
|
/** Elapsed time timer keeping the best try.
|
|
*/
|
|
class BenchTimer
|
|
{
|
|
public:
|
|
|
|
BenchTimer()
|
|
{
|
|
#ifdef WIN32
|
|
LARGE_INTEGER freq;
|
|
QueryPerformanceFrequency(&freq);
|
|
m_frequency = (double)freq.QuadPart;
|
|
#endif
|
|
reset();
|
|
}
|
|
|
|
~BenchTimer() {}
|
|
|
|
inline void reset(void) {m_best = 1e6;}
|
|
inline void start(void) {m_start = getTime();}
|
|
inline void stop(void)
|
|
{
|
|
m_best = std::min(m_best, getTime() - m_start);
|
|
}
|
|
|
|
/** Return the best elapsed time in seconds.
|
|
*/
|
|
inline double value(void)
|
|
{
|
|
return m_best;
|
|
}
|
|
|
|
#ifdef WIN32
|
|
inline double getTime(void)
|
|
#else
|
|
static inline double getTime(void)
|
|
#endif
|
|
{
|
|
#ifdef WIN32
|
|
LARGE_INTEGER query_ticks;
|
|
QueryPerformanceCounter(&query_ticks);
|
|
return query_ticks.QuadPart/m_frequency;
|
|
#else
|
|
struct timeval tv;
|
|
struct timezone tz;
|
|
gettimeofday(&tv, &tz);
|
|
return (double)tv.tv_sec + 1.e-6 * (double)tv.tv_usec;
|
|
#endif
|
|
}
|
|
|
|
protected:
|
|
#ifdef WIN32
|
|
double m_frequency;
|
|
#endif
|
|
double m_best, m_start;
|
|
|
|
};
|
|
|
|
}
|
|
|
|
#endif // EIGEN_BENCH_TIMER_H
|