Hi!
In one of the e-mail accounts I have around 60.000 emails.
Whenever I use the search function in Roundcube, it takes around 1 minute for each search.
From what I understand this is not a Roundcube problem, but it is actually related to Dovecot.
I know that this can be improved by installing Dovecot Full Text Search through the fts-dovecot plug-in.
But this requires upgrading the Dovecot version.
@myVesta could you please find some time to check this?