Well, I don't think I knew that, but then I've always built EXEs, so I guess I was getting the best performance. But for most apps, performance tuning is not all that important. VFP is fast, hardware is fast these days, as are networks. I do have to sometimes do some work on particular SQL statements that are complex to make them run as fast as possible, but I've never had to worry about the speed of a class-based method vs. a UDF. Good to know this, however.

>No offense, but this is one of the things I'm surprised more people don't know. If you build stuff into an exe there's better performance than if they're left on the disk. It's not just the difference between the OS searching for files. It seems VFP has a special way to access files in the exe. I'm not sure of the mechanism, but the result have been there for at least 10 years! :) I distinctly remember showing this to Jim Nelson when we first worked together.
>
>Performance testing of the final exe is best!