A fun discussion, but to put it into perspective.
Traveling across the Milky Way, roughly 100,000 light years would take:
The Enterprise-D (Next Generation) and ships from that time (DS9, Voyager, etc) at Warp 9.6 (1,909 time the speed of light) would take roughly 33 years.
While, according to StarWars.wikia anyway, ships traveling through HyperSpace could cross that distance in a few hours to a few days depending on the actual path.
Imagine having Fleets on standby at various points of interest throughout the galaxy. It is easy to see how entire Fleets can arrive to the battle within minutes!