Re: nnimap slowness

[David Abrahams <dave@boost-consulting.com>]

Thanks for following up, Simon...

Simon Josefsson <jas@extundo.com> writes:

> David Abrahams <dave@boost-consulting.com> writes:
>
>>> For small data, the cause is much more likely to be server slowness or
>>> network latency, so please send try sending a 5MB attachment or
>>> something.
>>
>> OK, here:
>
> Function Name                       Call Count  Elapsed Time  Average Time
> ==================================  ==========  ============  ============
> gnus-summary-reselect-current-group      1           8.132         8.132
> gnus-summary-rescan-group                1           8.132         8.132
> nnimap-request-group                     2           6.43          3.215
> imap-send-command-wait                  14          6.339         0.4527857142
> imap-wait-for-tag                       14          6.339         0.4527857142
> nnimap-request-update-info-internal      2           6.2989999999  3.1494999999
> imap-search                             11          5.927         0.5388181818
> gnus-group-get-new-news-this-group       1           4.055         4.055
> gnus-summary-read-group                  1           3.586         3.586
> gnus-group-read-group                    1           3.586         3.586
> gnus-summary-read-group-1                1           3.586         3.586
> gnus-select-newsgroup                    1           3.526         3.526
> gnus-activate-group                      1           3.465         3.465
> gnus-request-group                       1           2.965         2.965
> gnus-retrieve-headers                    2           0.58          0.29
> ...
>
> It seems the IMAP SEARCH command is causing the delay (most of the
> nnimap related delay is in imap-search), suggesting that the server
> opens large messages when the SEARCH command is invoked.  This is
> unnecessary, since Gnus only searches for flags (unseen, seen, ticked,
> etc).  Perhaps you could forward this observation (after verifying it
> in the source) 

The source of what?

> to the IMAP server administrator/developers to have them improve
> searches for flags.

We're using Communigate Pro, for what that's worth to you.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com