I have newer 32gb Nexus 7 which slowed to a crawl with the 4.2 update. I had at least 10gb of free space, so that was not the issue. I tried clearing the caches, the lagfix app, system restore, and more, but nothing seemed to help. Performance was terrible.
Can I update to 4.2.2 while being rooted or I would have to un-root,install the update and root it again?
I finally got sick of it and restored my Nexus to 4.1.2 Now it is running fast like it should. Some of the new features in 4.2 were neat and I miss them, but it made my Nexus unusable.