Using Workers to improve performance

I have a nice app framework that animates well across devices however it's not 100% as smooth as native.

Has anyone put Workers  around code in Air to improve performance and if so can they recommend where in general terms?

I'm thinking of putting one in my net service singleton to abstract all the data calls and parsing results. I was wondering if folks would recommend other places. I'd like to be able to wrap one around the TweenEngine if possible to improve animation performance.

It's a pretty advanced subject so I know most folk won't have touched them.