Re: something like linum.el ought to be added

[Markus Triska]

"Juanma Barranquero" <address@hidden> writes:

> `linum-update-window' only needs to compute it once, while the
> linum-format function is called for each line and would have to do
> convoluted things to cache it (and somehow detect buffer changes).

It need not be convoluted: What you probably want instead is a
linum-before-line-numbering-hook, where users can compute everything
their format function needs. Is that it?