On Sat, Apr 06, 2013 at 11:31:53AM +0200, Jonny Oschätzky wrote:
If you have a big mailbox (my "All Mail" contains ~150,000 messages), then the Google IMAP server is very slow. I've checked this with Thunderbird and the result is mostly the same. TB opens the box very fast and then it takes a long time to update the header cache.
Google has announced that it is working on support for the CONDSTORE and QRESYNC IMAP extensions, which should help a whole lot for the disconnected use case. It will allow a client to ask "what has changed since I last connected?" rather than the current situation where the metadata for the entire mailbox needs to be fetched to determine flag changes and deleted messages.
