RandomTime.cpp File Reference

Timing RandomLib. More...

#include <iostream>
#include <iomanip>
#include <vector>
#include <string>
#include <ctime>
#include <sys/time.h>
#include <RandomLib/Random.hpp>
#include <RandomLib/NormalDistribution.hpp>
#include <RandomLib/RandomSelect.hpp>

Go to the source code of this file.

Macros
#define	TIME(expr, esttime)

Functions
double	HighPrecMult ()
long long	HighPrecTime ()
template<typename Random >
void	Time (Random &r)
int	main (int, char **)

Detailed Description

Timing RandomLib.

Compile/link with, e.g.,
g++ -I../include -O2 -funroll-loops -o RandomTime RandomTime.cpp ../src/Random.cpp
./RandomTime

See Timing results, for more information.

Copyright (c) Charles Karney (2006-2011) charl.nosp@m.es@k.nosp@m.arney.nosp@m..com and licensed under the MIT/X11 License. For more information, see http://randomlib.sourceforge.net/

Definition in file RandomTime.cpp.

Macro Definition Documentation

#define TIME	(		expr,
			esttime
	)

Value:

{                                            \
    long long t1, t2;                                                   \
    long long c1 = r.Count();                                           \
    size_t m = int(1.e9/esttime+1);                                     \
    t1=HighPrecTime();                                                  \
    for (size_t j = m; j; --j) { expr; }                                \
    t2=HighPrecTime();                                                  \
    std::cout << std::setprecision(1) << std::setw(8) << std::scientific \
              << 0.1*std::floor((t2-t1)*HighPrecMult()*1.0e10/m+0.5) << "ns "; \
    std::string cmd(#expr);                                             \
    std::string::size_type p;                                           \
    p = cmd.find("template ");                                          \
    if (p != std::string::npos) cmd = cmd.substr(0,p) + cmd.substr(p+9); \
    p = cmd.find(" = ");                                                \
    if (p != std::string::npos) cmd = cmd.substr(p + 3);                \
    p = cmd.find("Random::");                                           \
    if (p != std::string::npos) cmd = cmd.substr(0,p)+cmd.substr(p+8);  \
    p = cmd.find("std::");                                              \
    if (p != std::string::npos) cmd = cmd.substr(0,p)+cmd.substr(p+5);  \
    if (cmd[0] == '(')                                                  \
      cmd = cmd.substr(1,cmd.size()-2);                                 \
    std::cout << std::setprecision(1) << std::setw(5) << std::fixed     \
              << (r.Count()-c1)/float(m) << "rv" << " per " << cmd << "\n"; \
  }

Definition at line 63 of file RandomTime.cpp.

Referenced by Time().

Function Documentation

double HighPrecMult

(

)

Definition at line 37 of file RandomTime.cpp.

long long HighPrecTime

(

)

Definition at line 46 of file RandomTime.cpp.

template<typename Random >

void Time

(

Random &

r

)

Definition at line 89 of file RandomTime.cpp.

References TIME.

int main	(	int	,
		char **
	)

Definition at line 173 of file RandomTime.cpp.