GP - find_MAP taking a lot of time to start


One quick question. When I use find_MAP to run a hierarchical setup of multiple GPs, it takes a huge amount of time to start the optimization, while the optimization afterwards is fairly quick. No progress bar or any information. Also, during this time, it uses 100% of a single core. Any way to check what is happening and reduce this setup time? Is it something like copying data between cores or calculating test values to use further in the optimization?