Absolutely fascinating.
I constantly run into the issue of a tremendous increase in render time from one export of the same sequence to the next. Using identical settings in AME, the first h.264 export finishes a 3 minute Red sequence with minor gpu enabled effects in about 5 minutes, however if I need to re-export that same sequence it takes over 90 minutes. Even after a reboot it struggles. Quite strange
James Drake Films
http://www.jdfnet.com
Video Production based in Denver, Colorado