i++ vs ++i (циклы)

for(ptrdiff i = 0; i < 10; i++) {
 
}

*iterator++

*iterator; ++iterator;

#include <windows.h>
#include <iostream>
 
using namespace std;
 
_int64 FileTimeToQuadWord(PFILETIME ptt) 
{ 
return(Int64ShllMod32(ptt->dwHighDateTime, 32) | ptt->dwLowDateTime); 
} 
 
int main(){
volatile int v=0;
 
 
FILETIME ftUserStart, ftKernalStart, ftBuff,
         ftUserEnd  , ftKernalEnd;
 
HANDLE hThread = GetCurrentThread();
 
//------------------------------------------------------------------------------------
 
GetThreadTimes(hThread,&ftBuff,&ftBuff,&ftKernalStart,&ftUserStart);
 
for (int i=0; i<INT_MAX/2; ++i )
      v=i;
 
 
GetThreadTimes(hThread,&ftBuff,&ftBuff,&ftKernalEnd,&ftUserEnd);
 
cout<<v<<endl;//что бы оптимизатор не удалил циклы
 
 
cout<<"++i User "<<FileTimeToQuadWord(&ftUserEnd)-FileTimeToQuadWord(&ftUserStart)<<endl;
cout<<"++i Kernal "<<FileTimeToQuadWord(&ftKernalEnd)-FileTimeToQuadWord(&ftKernalStart)<<endl;
 
//----------------------------------------------------------------------------------
 
GetThreadTimes(hThread,&ftBuff,&ftBuff,&ftKernalStart,&ftUserStart);
 
for (int i=0; i<INT_MAX/2; i++ )
      v=i;
 
GetThreadTimes(hThread,&ftBuff,&ftBuff,&ftKernalEnd,&ftUserEnd);
 
cout<<v<<endl;
 
cout<<"i++ User "<<FileTimeToQuadWord(&ftUserEnd)-FileTimeToQuadWord(&ftUserStart)<<endl;
cout<<"i++ Kernal "<<FileTimeToQuadWord(&ftKernalEnd)-FileTimeToQuadWord(&ftKernalStart)<<endl;
 
cin.get();
 
return 0;
}