Re: Lisp watchpoints

[Stefan Monnier]

> Another comment is: do we care about scalability of property lists for
> storing watchers?

As long as we only look up the property list for those few symbols that
have the "hooked" bit set, I think the slow down shouldn't be worrisome.
Also property lists are usually reasonably short (not much than 10
elements on those lists), so looking them up should be reasonably quick.

[ Reminds me: did I understand correctly that you found gethash to be
  faster than Fmemq on redisplay--variables?  For such a small number
  of elements, I find it really surprising, since I thought the
  generally expected "threshold" where gethash is faster than assq was
  somewhere in the order of a hundred elements.  ]


        Stefan