Lawrence Bottorff <borgauf@gmail.com> writes:

> Once again, I've added some package that makes a 20k-line/1 mg .org file kill Emacs' performance and max out my CPU. Here's my
> ELPA installed:
>
> ...
>   org                20150202      installed             Outline-based notes management and organizer
>   org-plus-contrib   20150202      installed             Outline-based notes management and organizer
> ...

Probably not the reason, but as Rasmus pointed out, you need one or the
other - not both.

Nick