4 ms·

As fanf2 said, MSNs != UIDs. Also, I didn't mean to imply that MSNs are an insurmountable limitation for performance, they just complicate things a lot. I'm no

• edoceo 7y ago
  Dovecot puts those index files in the maildir too, so one can read those directly if wanted.
• mehrdadn 7y ago
  The cost of deletions is heavy, and I wouldn't have done it this way, but note that where it really matters is if you have to do this repeatedly in a loop. But you don't have to do it repeatedly -- you can just delete a ton of messages at once, at the same cost as deleting a single once. As long as user perceptions go, the network latency is probably going to dominate shifting down even a million integers (< 2 ms on my machine), which I suspect most people don't even have.
• kbenson 7y ago
  > Basically, building a mail index for UID<->MSN translation that can serialize to disk, which would explain how it doesn't necessarily need absurd amounts of RAM and can select fast That does explain why indexes can get corrupted and need to be cleared out, and why load balancing IMAP can get tricky.