Skip metadata searching when running T4s?

I did some profiling and it looks like nearly all the time is spent when the BaseDomainModelTemplate makes the MetadataTypeHelper in the Generate() method.  I put some timings in and the overall process of generating our T4s takes between 23 and 33 seconds (seems to depend on whether there have been other changes in the project, whether it has been rebuilt, etc.).  And just to do the metadata stuff takes between 20 and 32 seconds.  That is a lot of time.

Making matters worse, we don't use any metadata 'buddy' classes in our app.  From what I could tell, the MetadataTypeHelper stuff was used for these buddy classes.  Of course, I just took a quick look so maybe that class supports other features as well.

I guess my two questions are:  Is the MetadataTypeHelper stuff only necessary to support the 'buddy' classes?  And if so, could we have an option to disable that processing to speed up the code generation?

It's true that running the T4s isn't something that gets done all the time.  However, we do make lots of changes to our EDMXs (add a parameter to a stored procedure, tweak a column in a table, etc.) even during normal developement.  And having to wait 30 seconds everytime you save gets very annoying.  Also, we leverage custom T4s to do a lot of work for us so even when there aren't any model changes, we'll sometimes be running the T4s over and over again.  Couple that with the fact that we have quite a few models (where each model takes a long time - even for tiny models)....we are starting to feel the pain.