I think it's clear we aren't going to be taking this patch in its current form. Perhaps there are better ways to do what these files do (I sure think there are!) but I don't think microoptimizing the copying is something people are super excited about. It sounds like rethinking how to make these functions more convenient for programmers to maintain reliably would be more valuable.
I guess I'll mark it Returned with Feedback -- if there are significant performance gains to show without making the code harder to maintain and/or a nicer way to structure this code in general then we can revisit this. -- Gregory Stark As Commitfest Manager
