My ship currently has ~75,000 salvage cannon blocks. I can view it in build mode with the computer selected (purple boxes showing) without too much framerate drop, but as soon as I place any more it drops to less than one frame per second. Switching in and out of flight mode fixes this sometimes, as well as just waiting for a significant amount of time. As you can imagine it's fairly crippling on a build of this scale.
Not necessarily related but an option to turn off the purple selection cubes would be delightful as well.
Not necessarily related but an option to turn off the purple selection cubes would be delightful as well.