For no reason at all, 1.7 lags like never before. Even on the title screen, the screen moves so slow and any buttons you click or move over have heavy amounts of lag.
In 1.6.4 downwards, I usually get 60fps easy.
In the first 1.7 snapshots, I had the bug where maximizing the screen gave you a lower fps then if you kept it a small window (MC-30158).
Now in the latest snapshots and the release of 1.7, I get around 0-10fps. Why?
I don't want to give up minecraft, but if this can't be fixed then I'm going to have to stick to 1.6 for now. Which is such a shame because 1.7 is an amazing update. :/
Related issues
Attachments
Comments

I don't think it's a duplicate. My game doesn't freeze randomly like his does, it just lags an awful lot more.
Problem seems to occur on nvidia graphics cards. A lot of others still have this problem, too. Please fix this problem.
Did you try setting everything to maximum performance, less fancy