On 21.6.2012, at 23.48, Reindl Harald wrote: >> Someone benchmarked Dovecot a while ago in this list with and without >> imapproxy and the results showed that imapproxy simply slowed things down by >> adding extra latency. This probably isn't true for all installations, but I >> don't think there's much of a difference either way. > > depends on network-latency, parallel users and last but > not least count of folders - if you have 30 folders and > roundcube refreshs every 20 seconds it will make in the > worst case 180 connections for one user per minute > > maybe a bechmark with high load shows other values > > but felt performance in our setup is much better with > imapproxy in front - roundcube feels like a desktop client
Oh, and of course it also depends on Dovecot configuration :) Authentication cache is needed and login processes must be in high performance mode. There is still the extra work of forking a new imap process (could also be avoided with yet another config option) and some other extra CPU usage, but those shouldn't cause much of a difference. The extra network latency during login is a good point though.
