Ok, I trace it with imap_debug option.
First level of slowness was thread mode. [UID THREAD REFS US-ASCII
ALL] 1s
Second level of little slowness was sort by date. [UID SORT (ARRIVAL)
US-ASCII ALL] 0.7s
Final query looks like this: [UID SEARCH ALL] 0.1s
But how 1 + 0.7 became 3.5s of waiting request time? (I get it from
profiler in browser)
And is there in chance to increase performance without disabling threads?
On 2018-10-25 08:55, A.L.E.C wrote:
On 10/24/18 7:59 PM, Alexey wrote:
I have user with approximately 500000 emails in his INBOX folder and this is not limit. And there is some inconvenience in viewing this folder. It takes about 5-7 seconds to display list of emails in folder. Pagination is set to 100 emails per page. I checked that IMAP server complete request "FETCH 1:100 ENVELOPE" in 147ms, and "FETCH 1:* ENVELOPE" in 6 second. This is why I begun to think that RoundCube may request for all emails instead of 100. Roundcube is configured for default sort order: descending by receiving date.
Try with disabled or just different sorting (in messages list options menu). Enable imap_debug to see in the log what imap commands are used and with what timing.