Re: ELP results for entering the Gnus list (~10 seconds elapsed time :)

[Simon Josefsson <jas@extundo.com>]

Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> Yup, `nnheader-nov-delete-outside-range' is called to remove lines
> that are before the smallest number and higher than the largest
> number.  This means that `gnus-get-newsgroup-headers-xover' is parsing
> a very large buffer.
>
> I think we need to write a new function that looks at the "gaps" in
> the article numbers and decides whether to remove the superfluous
> lines or not according to some heuristic.  Say -- if the "gap" is more
> than 50 articles, it will probably be more efficient to remove the
> lines in between.

In the nnimap NOV cache I found these functions too slow (especially
the "braid-nov" function), so it just inserts the entire NOV content,
except lines below the minimum article number in the requested range,
and above the maximum.  IIRC.