+
+>>>>> Since the argument to `hook` is optional, the pagespec is only
+>>>>> interpreted if it is given. So there is no extra overhead
+>>>>> (beyond an unused `if` branch) in 99% of the cases.
+>>>>>
+>>>>> Rewriting the external plugin's shim using Perl is a good idea,
+>>>>> and one that I wish I had thought of earlier. On the other
+>>>>> hand, it doesn't set a great precedent about the usability of
+>>>>> external plugins. --[[chrismgray]]