Crazy high cpu on sonarr 3, mac core 2 duo

Sonarr version (exact version): 3.0.3.658
Mono version (if Sonarr is not running on Windows): 6.0.0.334
OS: Mac OS X 10.10.5
Debug logs: need a bit of help on this (see below). also, is it possible to pm this? (ultraparanoid)
Description of issue:

i think a lot of the sonarr issues i’m experiencing (series not updating, searches stalling, files not post-processing, etc., without restating sonarr) are due to cpu slamming the ceiling constantly.

i do realize v3 is beta/preview/etc., but i should note v2 worked flawlessly on the same hardware (also acknowledging new sometimes needs more).

as far as getting log-help—i know where they are and how to get them, i don’t know which level i need nor “when” to grab them (i suspect rss is part of the culprit, too, so i don’t know how to account for that).