Re: Why doesn't Info `T' cache node tree for current file?

[Juri Linkov]

> Anyway, no _need_ to do anything. My thought was that if someone uses `T', 
> s?he
> is likely to do so again, and likely with the same file. Since we have gone to
> the trouble of building the node tree (graph), why not save it for possible
> reuse? That's all.

It is not very quick, since the code has to reread all Info subfiles
(its slowest part).  When the delay after typing `T' is more than 1 sec,
this is unbearable for many users.  So we could cache the TOC buffer per
Info file, if this costs us nothing.  I see one problem: how to refresh
the cached TOC buffer when the Info file changes - the usual key `g'
for buffer refreshing is already allocated to `Info-goto-node'.

-- 
Juri Linkov
http://www.jurta.org/emacs/