A slowness in the Agent

A slowness in the Agent

[Lars Magne Ingebrigtsen]

I just cvs uppped a bit here, and Gnus suddenly was much slower than
before.  After peeking around quite a bit, the most likely culprit is
`gnus-agent-read-agentview', which now calls
`gnus-uncompress-sequence' about 9K times for me.  Which takes a
while.

I've inlined the call, which helps a bit, but I think the fundamental
problem might be that `gnus-agent-read-agentview' tries too hard.
The Emacs reader is really very fast, and almost any compression one
tries to do in Emacs Lisp is bound to be slower than just calling
`read' on a huge whopping list.

Or I may be poking around in the wrong place.
 
-- 
(domestic pets only, the antidote for overdose, milk.)
  larsi@gnus.org * Lars Magne Ingebrigtsen

Re: A slowness in the Agent

[Kevin Greiner]

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

> I just cvs uppped a bit here, and Gnus suddenly was much slower than
> before.  After peeking around quite a bit, the most likely culprit is
> `gnus-agent-read-agentview', which now calls
> `gnus-uncompress-sequence' about 9K times for me.  Which takes a
> while.
>
> I've inlined the call, which helps a bit, but I think the fundamental
> problem might be that `gnus-agent-read-agentview' tries too hard.
> The Emacs reader is really very fast, and almost any compression one
> tries to do in Emacs Lisp is bound to be slower than just calling
> `read' on a huge whopping list.
>
> Or I may be poking around in the wrong place.

Well, that compression has been in use for over a year now so I don't
see why it would suddenly make gnus much slower.  If you truely think
that it is an issue, reverting back to No Gnus 0.1 will give you a
version of gnus-agent-read-agentview that can be configured to turn
the compression off.  Hmmm...  I wonder if that is what you had done;
configured your gnus to disable the compression.

For the record, I didn't add the compression to save disk space but to
improve performance.

What bothers me is that your seeing 9K calls to
gnus-agent-read-agentview.  That seems excessive unless you have 9K
groups.

Kevin

Re: A slowness in the Agent

[Lars Magne Ingebrigtsen]

Kevin Greiner <kgreiner@xpediantsolutions.com> writes:

> Well, that compression has been in use for over a year now so I don't
> see why it would suddenly make gnus much slower.  If you truely think
> that it is an issue, reverting back to No Gnus 0.1 will give you a
> version of gnus-agent-read-agentview that can be configured to turn
> the compression off.  Hmmm...  I wonder if that is what you had done;
> configured your gnus to disable the compression.

Hm...  I don't think so.  But I could be wrong.  :-)  What would the
variable to disable the compression be?

> What bothers me is that your seeing 9K calls to
> gnus-agent-read-agentview.  That seems excessive unless you have 9K
> groups.

9K calls to `gnus-uncompress-sequence'.  Only 90 calls to
`gnus-agent-read-agentview'. 

-- 
(domestic pets only, the antidote for overdose, milk.)
  larsi@gnus.org * Lars Magne Ingebrigtsen