1 ddc03123 2020-03-28 op Mutt is, by far, my favourite mail client. It's small, configurable,
 2 ddc03123 2020-03-28 op fast and it does not get in your way. It's a great tool.
 3 ddc03123 2020-03-28 op 
 4 ddc03123 2020-03-28 op My setup involves various maildir: I have a decent amount of filters
 5 ddc03123 2020-03-28 op that I use to order the mail in different directories.
 6 ddc03123 2020-03-28 op 
 7 ddc03123 2020-03-28 op One thing that I've found annoying is switching maildir: opening ones
 8 ddc03123 2020-03-28 op with ~3k mail takes too much time, at least on my machine. Now I think
 9 ddc03123 2020-03-28 op that using the `threads` sorting was the culprit, but it's only a
10 ddc03123 2020-03-28 op guess.
11 ddc03123 2020-03-28 op 
12 ddc03123 2020-03-28 op Anyway, while I was searching the manpage for a totally different
13 ddc03123 2020-03-28 op issue, I've found the `header_cache` settings. Quoting the manpage:
14 ddc03123 2020-03-28 op 
15 ddc03123 2020-03-28 op > This variable points to the header cache database. [...] By default
16 ddc03123 2020-03-28 op > it is *unset* so no header caching will be used.
17 ddc03123 2020-03-28 op >
18 ddc03123 2020-03-28 op > Header caching can greatly improves speed when opening POP, IMAP HM
19 ddc03123 2020-03-28 op > or Maildir folders, see "caching" for details.
20 ddc03123 2020-03-28 op 
21 ddc03123 2020-03-28 op There are also other relating settings, like `header_cache_compress`
22 ddc03123 2020-03-28 op that may be interestig.