bug#40355: [PATCH] Implement caching for libravatar lookup

[Lars Ingebrigtsen]

Philip K <philip@warpmail.net> writes:

> Checking if a domain has an avatar server associated with it requires
> at most two (synchronous) DNS queries, at least to ultimately default
> to "libravatar.org". Caching the results of domain lookups reduced the
> evaluation time (on my machine) from ~0.3s to an instantaneous
> evaluation.
>
> * lisp/image/gravatar.el (gravatar--service-libravatar): Check if
>   domain has already been resolved before staring DNS queries
> (gravatar-libravatar-cache): New variable.

The code has changed a bit (and become asynchronous), but adding caching
would be nice.

Can you re-spin the patch on top of the current implementation?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no