Help me to understand here.  You want to check in a patch adding 300 new lines of C code to the types module during beta, for a speed optimization, after we've already hit beta?

While I like speedups as much as the next guy, I would be happier if this waited for 3.6.

Of course, if Guido is overruling me, then Guido is overruling me and you get to check it in.