I tested this by timestamping tcpdump output while issuing this command directly to dovecot (limit 100 works, but does nothing) and there is no difference, it keeps taking ~160ms to respond.
b. On 10 April 2016 at 10:27, Adrian Minta <adrian.mi...@gmail.com> wrote: > It will be nice if the "SELECT MyMailbox" command will be "SELECT > mymailbox LIMIT 100" or something, to get the first files since only the > last messages are shown to the user. > I don't know if "Limit" clause is available over IMAP. > > > > > On 04/09/2016 09:04 PM, Bostjan Skufca wrote: > >> Hi there, >> >> (context: I was optimizing Roundcube mailbox list server response, and in >> that 300-400ms response time, around 170ms is spent on single fgets() call >> which is waiting IMAP repsonse to "SELECT MyMailbox" command) >> >> I straced dovecot and of the whole request/response process, around 30ms >> is >> spent for everything else, and overwhelming majority of time (150-170ms) >> is >> spent for reading dovecot-uidlist file for given mailbox. >> >> I skimmed over src/lib-storage/index/maildir/maildir-uidlist.c >> and src/src/lib/istream.c, but I am out of ideas on how to optimize >> mentioned file reading elegantly to make it faster. >> >> Is there any way to cache parsed content of uidlist file(s) or some other >> obvious quicktrick I am missing to speed this process up? >> >> Does anyone have any other ideas, how to speed this up? >> >> >> b. >> > > -- > Best regards, > Adrian Minta >
