After updating to 2139 build I've already twice experienced random high cpu usage. Constantly showing 150%. And also sublime was eating a lot of memory. Approximately 100mb per 20 seconds. After it got to around 800mb of ram i just closed it. I wasn't doing any file search or anything like that, simply working with maybe 5-7 files.
Not sure if this happened before the upgrade, I'm using sublime 2 for only 2-3 weeks.
I'm working on MacBook Pro running Lion with all latest updates.
Please let me know how can i send you some debug log or smth to help you investigate what's happening.