I recently switched to CC and opened a project which was created in CS5.5. But rendering the same comp takes about 3 hours in 5.5, but over 10 hours in CC, without any changes. What could the reason be?
I'm on a mac, yosemite, CUDA not enabled, Classic 3D renderer, no 3rd party plugins, Multiprocessing option disabled.
Was multiprocessing enabled on CS5.5? Because, if it was, that might be it.
What are your system specs?
What exact version of AE are you using now?