Comment 2 for bug 164030

This is necessary as the installer needs to verify the options that you've selected on each page. In the case of the partitioner, it needs to run through the tests with every change as your options change depending on the selections you make there.
There may be some speed ups in this for 8.04, but only as the possible byproduct of the usability and reliability work as this is a long term support release and major speed improvements will require changes to the foundation that are too intrusive for this release.

Thanks,
Evan