I am testing Ubuntu Phone OS since 2 months. In this time the speed and reaction of Phone OS increased by every update. Yesterday I made an update to 1.0 via phablet-flash ubuntu-system --no-backup . Now I have a phone OS that is incredible slow. Is this problem known? Are there any options to solve this speed problem? Looking for some answers. Thanks a lot.
Yes, it is a known problem:
Unfortunately the Galaxy Nexus is starting to show its age, so certain operations that can run efficiently on newer hardware are problematic on the it. Things may improve, but I don't know if there is a concrete time line.
As a temporary solution, you could try disabling Mir on the phone by deleting the file