Cruiser has now
offline routing (GraphHopper).
The graph folder can be defined at 'Settings' - 'Navigation'.
Cruiser supports graphs with contraction hierarchies enabled or
disabled.
From Wiki:
Contraction
hierarchies is a post-import process which makes routing
faster (bidirectional algorithms).
At the moment only one travel mode (usually car) can be used
if contraction hierarchies is enabled.
A more flexible routing (but slower) with multiple travel
modes (car, bike, foot) requires graphs with contraction
hierarchies disabled.
I have created contraction hierarchical graphs for some regions.
http://www.talent.gr/public/graphs/
There are also some no contraction hierarchical graphs, having the
suffix '_all'.
You can email me if you need more graphs.