Re: Gnus slow?

[Katsumi Yamaoka <yamaoka@jpl.org>]

You might not need to perform ELP again.

>>>>> In <87u0rv8on2.fsf@orebokech.com> Romain Francoise wrote:

>> I don't know why gnus-activate-group spends so many time and
>> seems to be called twice in B, but it is dominant.

It seems to be caused by calling nntp-request-group by way of
gnus-request-group.  It should have been clear if I looked at
the nntp profile which you got.  Probably, we should clarify the
reason why it is called frequently.

> It is slow because in version B, Gnus issues GROUP commands to the NNTP
> server and it is synchronous so it has to wait for the answer from the
> server.  To make it worse, it does it twice since groups are activated
> twice.

> You will find captures of the NNTP conversation between Gnus and
> news.gmane.org here: <URL: http://orebokech.com/tmp/gnus/>.  Version A
> issues LIST ACTIVE commands only, asynchronously.  Version B first
> issues GROUP commands for each of my groups, synchronously, then issues
> LIST ACTIVE commands like version A, then does GROUP commands again.  I
> see two separate issues:
> - why does version B send GROUP commands where version A doesn't?  They
>   seem unnecessary.
> - even so, why does version B send them twice?

I saw those captures.  Thanks.