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#include <stdio.h>
#include <vector>
#include <set>
#include <windows.h>
#include <algorithm>
#include <time.h>
using namespace std;
struct Chrono
{
LARGE_INTEGER liStart;
LARGE_INTEGER liStop;
void TimeStart()
{
QueryPerformanceCounter(&liStart);
}
double TimeStop()
{
QueryPerformanceCounter(&liStop);
LONGLONG llTimeDiff = liStop.QuadPart - liStart.QuadPart;
// To get duration in milliseconds
LARGE_INTEGER Frequency;
QueryPerformanceFrequency(&Frequency);
return llTimeDiff * 1000.0 / (double) Frequency.QuadPart;
}
};
double TestSet(int size, int numDiff)
{
std::vector<int> vec;
vec.reserve(size);
for(int i = 0 ; i < size ; i++)
{
vec.push_back(i%numDiff);
}
std::random_shuffle(vec.begin(), vec.end());
Chrono chrono;
chrono.TimeStart();
{
std::set<int> set(vec.begin(), vec.end());
}
return chrono.TimeStop();
}
double TestVecUnique(int size, int numDiff)
{
std::vector<int> vec;
vec.reserve(size);
for(int i = 0 ; i < size ; i++)
{
vec.push_back(i%numDiff);
}
std::random_shuffle(vec.begin(), vec.end());
Chrono chrono;
chrono.TimeStart();
{
std:vector<int> vecTemp(vec.begin(), vec.end());
std::sort(vecTemp.begin(), vecTemp.end());
std::vector<int>::iterator it = std::unique(vecTemp.begin(), vecTemp.end());
vecTemp.erase(it, vecTemp.end());
}
return chrono.TimeStop();
}
int main(int, const char **)
{
srand(time(NULL));
double timeSet;
double timeVec;
for(int size = 100 ; size < 100000000 ; size*= 10)
{
printf("Size;%d \n", size);
printf("NumDiff;Set;Vec \n");
// cas particulier 1%
timeSet = TestSet(size, size / 100);
timeVec = TestVecUnique(size, size / 100);
printf("%d;%lf;%lf \n", size / 100, timeSet, timeVec);
for(int numDiff = size / 10 ; numDiff <= size ; numDiff += size / 10)
{
timeSet = TestSet(size, numDiff);
timeVec = TestVecUnique(size, numDiff);
printf("%d;%lf;%lf \n", numDiff, timeSet, timeVec);
}
printf("\n");
}
return 0;
} |
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