#include <iostream>
#include <ctime>
#include <limits>
 
int main()
{
    unsigned char u = 86;
    signed char s = 86;
 
    clock_t first = clock();
    for(unsigned counter = 0;counter < std::numeric_limits<unsigned>::max();++counter)
        auto volatile tmp = u * 4;
    std::cout << "unsigned braucht " << clock() - first << '\n';
 
    first = clock();
    for(unsigned counter = 0;counter < std::numeric_limits<unsigned>::max();++counter)
        auto volatile tmp = s * 4;
    std::cout << "signed braucht " << clock() - first << '\n';
}

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