fastest vector iteration

[ProgrammerC++]

hallo alle,

i need to know whats the fastest way to iterate through vector

this:

for( vector<MyObj*>::iterator it = vMyVector.begin(); it != vMyVector.end(); it++ )
{
  MyObj * ptr = *it;

  //do something
}

or this:

for( int i = 0; i < vMyVector.size(); i++ )
{
  MyObj * ptr = vMyVector[i];

  //do something
}

greetings,