The following registry change will improve your SCOM 2012 console performance overall but I’ve notived a particular improvement when creating dashboard views.
HKCU\Software\Microsoft\Microsoft Operations Manager\3.0\console\CacheParameters\PollingInterval
The value can be from 0 to 10. 0 will disable automatic refresh and require using F5 to refresh manually. The every incriment will increase the console refresh period by 15 seconds to a maximum of 2 minutes and 30 seconds.