Re: nnimap slowness

[Simon Josefsson <jas@extundo.com>]

beaker@iavmb.pl (Krzysztof Jędruczyk) writes:

> Simon Josefsson <jas@extundo.com> writes:
>
>> Gnus do send several SEARCH commands, and this is quite inefficient,
>> but I believe fixing this would require changing the Gnus backend
>> interface, and that means work.  Several servers implement flag
>> searching without opening all articles though, so many people don't
>> have this problem.
>
> I don't think this has anything to do with the way gnus communicates
> with IMAP server. I use Gnus at work, where I have dual-boot
> Win2k/FreeBSD box. On Windoze big messages download very slowly, but
> when I reboot to FreeBSD (both OS' have GNU-Emacs 21.2, Oort Gnus 0.15
> installed) download is an order of magnitude faster. I tried
> increasing TCP window size in Windows (I did little tcpdump inspection
> and suspected that to be a problem), but it didn't help at all. So I
> just let it be this way. But agreed - this is a major pain-in-the-ass
> for w32+gnus+IMAP users...

Perhaps it is two unrelated problems, since David said it became slow
on large attachments which suggest the server do open the messages for
SEARCH commands.  But I wouldn't be surprised if the network stuff in
Emacs for Windows was inefficient somehow.  Report it as a Emacs bug?