[Dovecot] SQLite dovecot query caching

Hi,

I am wondering if Dovecot caches SQLite queries, and how well it works in high performance setups. I am particularly interested because in the below thread SQLite has been suggested as a means of Dovecot proxying connections to different ports.

http://old.nabble.com/director%3A-non-standart-ports-at-backends-td33991991....

Cheers, Dominic.