Oh, sorry, I missed your post while I was writing other posts, and I did not see this! Yes, I am trying to use the AMaZE demosaicking routine. I guess I should stick to a simpler one on this machine, and will kill all other procs.
EDIT: it looks like the longest time and largest number of tiles was for “atrous,” which I don’t know anything about. It’s not something I believe I enabled…