imapc fetch optimization

[Timo Sirainen]

On 28 Apr 2015, at 23:49, Nagy, Attila <bra at fsn.hu> wrote:
> 
> Hi,
> 
> imapc does a lot of UID FETCH $UID (BODY.PEEK[]), which is nice, because it works even with the dumbest IMAP server, altough it really kills performance, especially on high latency lines.
> 
> I wonder: if IMAP servers can effectively handle boundless fetches (like a list with all wanted UIDs, or simply 1:* if all are needed), do you see this as a good addition to develop?

Set mail_prefetch_count = 10 or 100 or something and it'll do larger FETCHes. The higher the value, the more memory/disk space is used for storing the received mails.