Hi,
The test is very application specific and not a good way to measure pinchangeint performance, however it does illustrate that there is a improvement.
A quick look at the assembly suggests that the instructions have been reduced from 104 to 52 - a saving of 50%.
My application is reading RC Signals, when one pin toggles, the adjacent pin also toggles, this means that the pin change int library will be servicing two pins each time it is called so the saving is very significant in this particular application.
Duane B