解决方案
Starting in ISE 12.2, the Routing defaults are set to Delay Driven instead of Resource Driven.
When you change the routing defaults from a delay driven approach to a resource driven approach, the run-time can be significantly reduced.
You can set the routing defaults in the GUI or by adding the following lines to your script file.
setattr main route_all_style resource
setattr main route_select_style resource