You can also use Cheat Engine. It allows you to apply a speed hack that will either slow or speed up a process, like WC3.
I use it a lot when testing my maps, because you can see exactly what's going on if you want, by playing the game at like 0.1x speed, or you can skip to where you need, by speeding the game up to 5x or whatever.
It affects the whole process, so you can use it for replays or while playing the actual game (offline only of course). Just google something like "how to use speed hack with cheat engine".