[Dovecot] Dovecot performance under high load (vs. Courier)

[Timo Sirainen]

On 21.6.2012, at 23.34, Reindl Harald wrote:

> Am 21.06.2012 22:22, schrieb Timo Sirainen:
>>> Do you know what webmails are caching vs. non-caching?  
>> 
>> Nearly all of them are non-caching. (I don't know of any caching ones.)
> 
> roundcube can if configured
> 
> additionally you should install imapproxy on the webserver
> wehre your webmail is running and configure the webmail for
> using 127.0.0.1 - so only one connection per user is
> persistent instead make a new one for each ajax-request

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.