I am working in #ArcMap #10.2.2 with the #districting extension, I have a state full of blocks loaded in and districting off of that and selecting #censusblocks is extremely slow. When I select one block or a few blocks it takes 10+ seconds to load and when I select a lot it takes 30+ seconds to load. I have used the definition query to only show two counties worth of blocks at a time. The only other layer I currently have right now is counties which is currently hidden. I've got a pretty powerful computer, 3.5 GHz Performance Rated at: 8.28 GHz, GeForce GTX 1070 video card, and 64 GB of ram. Not sure what's causing the slow performance?