To speed things up, one important thing is to check under the view button over the canvas to be sure not to use any of the render possibilities absolutely needed in the creation of your animation.Just uncheck everything.If you also under Menu: edit/project settings have the 32 floating point enabled and floatingpoint under the view button activated it will slow everything down. I just made a 3d animation of 6 different films in HD flying around and some lightning and turned all renderpossibilties off,turned the render quality to draft and using the resolution menu over the canvas to take down the resolution as low as possible.This was the only way to handle the animation work.Then activating again to see and adjust the final result.