The CPU usage with ST3 has been unusually high. It fluctuates between 30% and 90% pretty much all day long. I've been careful to give it grace while it's indexing a project, but this goes on long after that's done. Heck, even with all the Sublime windows closed, it's still buzzing around 40%.
I've seen several posts on here about unusual amounts of CPU usage, but almost all those posts go something like:
I've waited a while before posting this, and I'm quite certain this is a different issue. I don't know off the top of my head what information is going to be most valuable to you, so just ask me any questions you have, or any diagnostics you want me to report and I'll be happy to do it.
I'm on OSX Mountain Lion running ST3 build 3021.