Massive Performance decrease from Sencha Cmd b181 to b250
My guess is that the compiler's auto-dependency detection became a lot smarter... but also a lot slower.
If this is indeed the reason, I'd like to point out that we would rather prefer the faster compile time to a smarter dependency detection. For the (rare) scenarios where a dependency is not obvious we are all fine with adding the necessary compiler hints (//@require...).
Is it possible to disable some of the newly introduced parser features?
I understand that this must hurt because you invested much effort into making the compiler smarter, and I guess it was worth it to help smooth the out-of-the-box experience for smaller projects and programmers new to ExtJs/Touch (or Sencha Cmd) - for larger projects, however, I'd consider it a good investment to fine-tune dependencies manually in favor of faster build times.
One reason why I immediately fell in love with the new Sencha Cmd was the much faster build time compared to the older Sencha SDK Tools.