I used to have that problem until I excluded log files, images, and other extraneous files from my project. Find in project now works relatively quickly.
I don't consider my app "really small", or the prior two I worked on using TextMate.
I don't consider my app "really small", or the prior two I worked on using TextMate.
Another problem with TM's built-in "find in project" is that it's not incremental. AckMate will list matches as it finds them, whereas TM will only return results once it's read everything.