I was messing around with the game on my MacBook, and was able to alleviate this problem somewhat by lowering the resolution of the game.  Response lags that had previously been twenty or thirty gametime minutes went down to three or four, making the game moderately playable.  Perhaps give that a shot?

I was having this problem too, playing on my new MacBook.  It was most frustrating when my Rock Star sim was doing autograph sessions and it would take 45 game minutes to sign one autograph, making the session a failure.

However, I decided this must be an issue with memory or my graphics card, and started playing on my desktop PC, and then my Imac.  The problems have not recurred on either, with the same neighborhoods, mods, and custom content loaded.

Hopefully this isn't discussed somewhere else and I've missed it - if so please forgive, I'm still learning my way around the boards.  

Since installing the latest build of awesomemod, nonactive sims in community lots just stand around like zombies, not doing anything, to the point where they pee themselves and pass out from exhaustion.  I set bladderdecayoncommunitylots to false so they're no longer having accidents, but does anyone have any idea why the "gohome" urge is disabled?  Or why they don't seek to entertain themselves with chess or picnics or reading as they used to?  Perhaps there is an awesomemod setting that relates to this?

It's problematic because sometimes chosen sims show up in the lots and become casualties - when I switched back to their family the ones in the park the previous day were passed out and missing school and work.  (I realize this can be mitigated by disabling the stalker behavior, but I actually like it - it's like an impromptu party everywhere you go, handy for making friends and whatnot.)

Another odd thing is that when interacting with sims in community lots, there is a huge lag time between directing an action and its execution, like twenty plus sim minutes.  I tried to get my favorite rockstar sim to hold an autograph session and could only get two signed in four sim hours - very frustrating.

Thanks for your help and sorry if this is answered elsewhere.  I couldn't find anything about this in RTFM or by searching the threads.