Manipulation of Diegetic space and time

Manipulation of Diegetic space and time, is the editing of a film where it is made to look as if a long period of time is passing in just a few seconds, film editors use this to show the passage of time and skip through days or weeks in seconds, a good example is a clip from "The Karate Kid"

This is used to show his rigorous training in the space of a clip, even though it may have lasted weeks or months perhaps. It let's the audience know it's being a longer time than shown and it allows the director to include more footage in the film due to the shortening of time.

Another example would be Harry Potter -

The same concept, but the time travel is a lot more visible to the viewer as you can see the people around them working and the daylight changing.