I just installed sublime2 build 2165 on osx lion.
Even when there is no text document loaded - just the sublime window itself the cpu-load is between 5-120%. It also keeps eating memory. Starts out at about 30mb and after about 5 minutes it's at 180mb, and it keeps increasing at about 1mb every other second.
I did not install any plugins or alter anything. Just a clean install.
update: i just reverted to a "freshly installed state" according to: http://www.sublimetext.com/docs/2/revert.html. it seems to work better now - time to start editing