STL_timer.hh
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1 //=====================================================
2 // File : STL_Timer.hh
3 // Author : L. Plagne <laurent.plagne@edf.fr)>
4 // Copyright (C) EDF R&D, mar déc 3 18:59:35 CET 2002
5 //=====================================================
6 //
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License
9 // as published by the Free Software Foundation; either version 2
10 // of the License, or (at your option) any later version.
11 //
12 // This program is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 //
20 // STL Timer Class. Adapted (L.P.) from the timer class by Musser et Al
21 // described int the Book : STL Tutorial and reference guide.
22 // Define a timer class for analyzing algorithm performance.
23 #include <iostream>
24 #include <iomanip>
25 #include <vector>
26 #include <map>
27 #include <algorithm>
28 using namespace std;
29 
30 class STL_Timer {
31 public:
32  STL_Timer(){ baseline = false; }; // Default constructor
33  // Start a series of r trials:
34  void start(unsigned int r){
35  reps = r;
36  count = 0;
37  iterations.clear();
38  iterations.reserve(reps);
39  initial = time(0);
40  };
41  // Start a series of r trials to determine baseline time:
42  void start_baseline(unsigned int r)
43  {
44  baseline = true;
45  start(r);
46  }
47  // Returns true if the trials have been completed, else false
48  bool check()
49  {
50  ++count;
51  final = time(0);
52  if (initial < final) {
53  iterations.push_back(count);
54  initial = final;
55  count = 0;
56  }
57  return (iterations.size() < reps);
58  };
59  // Returns the results for external use
60  double get_time( void )
61  {
62  sort(iterations.begin(), iterations.end());
63  return 1.0/iterations[reps/2];
64  };
65 private:
66  unsigned int reps; // Number of trials
67  // For storing loop iterations of a trial
68  vector<long> iterations;
69  // For saving initial and final times of a trial
70  time_t initial, final;
71  // For counting loop iterations of a trial
72  unsigned long count;
73  // true if this is a baseline computation, false otherwise
74  bool baseline;
75  // For recording the baseline time
76  double baseline_time;
77 };
78 
STL_Timer::baseline
bool baseline
Definition: STL_timer.hh:74
STL_Timer::count
unsigned long count
Definition: STL_timer.hh:72
STL_Timer::check
bool check()
Definition: STL_timer.hh:48
STL_Timer::initial
time_t initial
Definition: STL_timer.hh:70
time
#define time
Definition: timeAdaptAutoDiff.cpp:31
STL_Timer::start
void start(unsigned int r)
Definition: STL_timer.hh:34
std
Definition: BFloat16.h:88
baseline
const double baseline
Definition: testSmartStereoFactor_iSAM2.cpp:51
STL_Timer::get_time
double get_time(void)
Definition: STL_timer.hh:60
initial
Definition: testScenarioRunner.cpp:148
STL_Timer
Definition: STL_timer.hh:30
STL_Timer::STL_Timer
STL_Timer()
Definition: STL_timer.hh:32
STL_Timer::baseline_time
double baseline_time
Definition: STL_timer.hh:76
STL_Timer::iterations
vector< long > iterations
Definition: STL_timer.hh:68
STL_Timer::start_baseline
void start_baseline(unsigned int r)
Definition: STL_timer.hh:42


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