I've read that I should avoid the postfix increment operator because of performance reasons (in certain cases).

But doesn't this affect code readability? In my opinion:

for(int i = 0; i < 42; i++);
    /* i will never equal 42! */

Looks better than:

for(int i = 0; i < 42; ++i);
    /* i will never equal 42! */

But this is probably just out of habit. Admittedly, I haven't seen many use ++i.

Is the performance that bad to sacrifice readability, in this case? Or am I just blind, and ++i is more readable than i++?