slow incremental indexing of maildirs with squat

[vitalif at yourcmc.ru]

Hi!

I'm using Dovecot 2.1.7 on Debian Wheezy 32-bit (package version is 
1:2.1.7-7+deb7u1) with maildirs.

My problem is that the incremental indexing of maildirs with squat takes 
a very long time... I don't know if it reindexes anything, but it seems 
it iterates though all messages on each search query and reads them. It 
works fast only on successive queries within several minutes, probably 
because of the messages being in cache.

What do you think, is it a bug?

-- 
With best regards,
   Vitaliy Filippov
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