Roundcube webmail is very slow

[Emilian]

I have a fresh install of Roundcube on a Ubuntu 16.04 server with Apache2, php7 and mysql-server 5.7. It takes alot of time to login and load pages(more than 10 seconds) and the server seems to have enough free RAM and CPU is barely used. I tried to use memcache but no change. I also enabled imap_debug as seen on other posts, but i don't see anything wrong (i attached a file with some imap logs).

Does anyone have any idea how to make roundcube faster?

Thanks.

[SKaero]

You can see it in the logs:

[07-Jun-2017 11:16:09 +0000]: <4lo2l216> [67E1] C: A0002 AUTHENTICATE PLAIN ****** [41]
[07-Jun-2017 11:16:38 +0000]: <15arm391> [AC13] S: * CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SPECIAL-USE

Roundcube sends the authentication and the mail server takes 29 seconds to respond. You need to look into why the mail server is taking so long to authenticate.

[Emilian]

ok thanks, i will have a look at that