Something interesting I've noticed when running on 11.50 beta - currently beta 16 - is that 124th ATC appears to be eating surprisingly much resources performance-wise. This may well have been the case with 11.41, too, but the Plugin Admin in 11.50 has a performance monitor. 124th ATC is consistently showing as consuming between 1.5-3fps, which I find is surprisingly high.
Any insight into why that is?
I use 2.0-a60 build 2431.