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#include "TestPerformanceArrayAccess.h"
#include "Vehicle.h"
#include <iostream>
#ifdef _WIN32
#include <windows.h> // WIN32 SDK GetTickCount function
#else
extern unsigned int GetTickCount();
#endif
#define TicksPerSecond 1000
static void ReportTiming(const char *s, unsigned int ts, unsigned int count)
{
std::cerr << "\n";
std::cerr << "Unmanaged Code Performance Results:\n";
std::cerr << " data type: " << s << "\n";
std::cerr << " seconds: " << ((double)ts / (double)TicksPerSecond) << "\n";
//std::cerr << " ticks: " << ts << "\n";
std::cerr << " count: " << count << "\n";
//std::cerr << " ticks per operation: " << ((double)ts/(double)count) << "\n";
std::cerr << " operations per second: " << ((double)count / (((double)ts / (double)TicksPerSecond))) << "\n";
std::cerr << "\n";
}
float multiplyByTwo(float f);
int TestPerformanceArrayAccess::Main(int /*argc*/, char * /*argv*/ [])
{
int err = 0; // 0 == no error
unsigned int ts = 0;
unsigned int begin = 0;
std::cerr << "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)" << std::endl;
std::cerr << "Begin TestPerformanceArrayAccess::Main" << std::endl;
std::cerr << std::endl;
Vehicle *vn = Vehicle::New();
Vehicle& v1 = *vn;
unsigned int i = 0;
unsigned int maxi = 10*v1.GetMaxIndex();
const unsigned int length = v1.TGetInfoArrayLength();
float *af = v1.InfoArrayBase();
float lf = 0.0;
std::cerr << "Direct C++ array write access 'af[i] = lf' loop..." << std::endl;
begin = GetTickCount();
for (i= 0; i<maxi; ++i)
{
af[i%length] = lf;
}
ts = GetTickCount() - begin;
ReportTiming("float", ts, maxi);
std::cerr << std::endl;
std::cerr << "Unchecked vtable write access 'v1.SetInfoArrayElementUnchecked(i, lf)' loop..." << std::endl;
begin = GetTickCount();
for (i= 0; i<maxi; ++i)
{
v1.TSetInfoArrayElementUnchecked(i%length, lf);
}
ts = GetTickCount() - begin;
ReportTiming("float", ts, maxi);
std::cerr << std::endl;
std::cerr << "Unchecked vtable read access 'lf = v1.GetInfoArrayElementUnchecked(i)' loop..." << std::endl;
begin = GetTickCount();
for (i= 0; i<maxi; ++i)
{
lf = v1.TGetInfoArrayElementUnchecked(i%length);
}
ts = GetTickCount() - begin;
ReportTiming("float", ts, maxi);
std::cerr << std::endl;
std::cerr << "Checked vtable write access 'v1.SetInfoArrayElementChecked(i, lf)' loop..." << std::endl;
begin = GetTickCount();
for (i= 0; i<maxi; ++i)
{
v1.TSetInfoArrayElementChecked(i%length, lf);
}
ts = GetTickCount() - begin;
ReportTiming("float", ts, maxi);
std::cerr << std::endl;
std::cerr << "Checked vtable read access 'lf = v1.GetInfoArrayElementChecked(i)' loop..." << std::endl;
begin = GetTickCount();
for (i= 0; i<maxi; ++i)
{
lf = v1.TGetInfoArrayElementChecked(i%length);
}
ts = GetTickCount() - begin;
ReportTiming("float", ts, maxi);
std::cerr << std::endl;
std::cerr << "End TestPerformanceArrayAccess::Main" << std::endl;
return err;
}
float multiplyByTwo(float f)
{
return f*2;
}
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