"sleeping due to recent directory modification" every time

[Scott M. <sc...@sm...>]

Getting this nearly every time I sync my local Maildirs
with Google's IMAP server:

    Maildir notice: sleeping due to recent directory modification.

It happens any time I run "mbsync -a" and there's more
than a handful of messages (which is nearly every
time).

If the sleep is required for safety, and is a harmless
informational notice, can we make it output only when
extra verbose/debug flags are passed? I get that it
should be done asynchronously (as per comments),
instead of this sleep-loop, but does it have to pollute
the output so much?

Note, I do see an undocumented '-Z' flag that stifles
it (and appears to do nothing else in the whole source
tree); is it safe to use this? Is there a reason it's
undocumented?

-- 
Scott