Is find and replace just not an important feature in sublime?
I work on data files a lot, which often involves extensive restructuring of files using regex.
I can completely lock up Sublime by doing something trivial like adding/removing line breaks in a smallish file, such as 3mb. Sometimes it will complete the job, sometimes I have to kill the program. This is on my work dev system, a macbook pro with a 3.1GHZ i7 proc and 16gb of ram, so, I doubt it has anything to do with lack of horsepower. Files larger than 10mb are typically a complete waste of time, I have given up trying. This was a problem with the previous version, and it hasn't gotten much better with version 3.
I know the line breaks example is one that trips up most editors, but it's a good example of how to strangle sublime.
I have found I can usually remote into my desktop at home, transfer the file across, complete editing the file (more than one find and replace), and transfer the file back long before sublime has returned to usability from just a single find and replace. And that's on an eight year old PC, and using EmEditor.