Comment 8 for bug 479478

This really has been discussed to death on the mailing list. The problem is that "the perform value" of an operation is not well-defined. To define this value, we would have to define a way that the value of all the perform calls in the build plan are to be rolled up into a value for the plan as a whole. And a way to roll the values of the operations that were performed to ENABLE performing this operation, etc.

If you look at the discussion in the mailing list, I proposed that one way to do this would be to have hierarchical plans, instead of flat plans. But this would be an extensive rewrite, really not adding a simple feature, but producing ASDF 4.0

For now, I'm afraid that makes it a WONTFIX. Sorry.