This is a small not about the difference between using cache and not using
the cache. The difference is tremendous when you have a lot of mail to check.

Without the cache (ie. on first try when using the cache).
Observe that I have a LOT of mailboxes that are not shown because there
is no new or unseen mail in them.

ola@chrystal:~$ du -m mail/projekt/debian/ mail/sendlists/debian mail/sendlists/spi mail/sendlists/debian/dev
21	mail/projekt/debian
48	mail/sendlists/debian/dev
134	mail/sendlists/debian
1	mail/sendlists/spi
48	mail/sendlists/debian/dev
So it is quite a lot of mail to scan. It does not recurse but my debcheck
program check all these directories.
Summary: 156 Mb to check.

ola@chrystal:~/bin$ date; debcheck; date
Thu Jul  4 11:49:22 CEST 2002
--Packages--
 New:    1 Seen:    2 Read:   49 [/home/ola/mail/projekt/debian/harden]
 New:    3 Seen:    0 Read:  554 [/home/ola/mail/projekt/debian/imp]
 New:    1 Seen:    0 Read:   91 [/home/ola/mail/projekt/debian/libfop-java]
 New:    1 Seen:    0 Read:    3 [/home/ola/mail/projekt/debian/liblog4j]
 New:    3 Seen:    0 Read:   33 [/home/ola/mail/projekt/debian/libxalan2-java]
 New:    1 Seen:    0 Read:  111 [/home/ola/mail/projekt/debian/wwwconfig-common]
--Debian lists--
 New:  141 Seen:   70 Read:  215 [/home/ola/mail/sendlists/debian/apache]
 New:   24 Seen:  525 Read:   78 [/home/ola/mail/sendlists/debian/beowulf]
 New:    3 Seen:   20 Read:   17 [/home/ola/mail/sendlists/debian/consultants]
 New: 1924 Seen: 3264 Read:  973 [/home/ola/mail/sendlists/debian/devel]
 New:    7 Seen:  153 Read:  175 [/home/ola/mail/sendlists/debian/devel-announce]
 New:  156 Seen: 1408 Read:  214 [/home/ola/mail/sendlists/debian/firewall]
 New:   31 Seen:  106 Read: 1105 [/home/ola/mail/sendlists/debian/java]
 New:  327 Seen:  478 Read:  139 [/home/ola/mail/sendlists/debian/mentors]
 New:   55 Seen:   56 Read:   91 [/home/ola/mail/sendlists/debian/newmaint]
 New:   23 Seen:   51 Read:   65 [/home/ola/mail/sendlists/debian/pilot]
 New:  270 Seen:  636 Read:  267 [/home/ola/mail/sendlists/debian/policy]
 New:  462 Seen: 1990 Read:  738 [/home/ola/mail/sendlists/debian/private]
 New:   33 Seen:   22 Read:   75 [/home/ola/mail/sendlists/debian/qa]
 New:  553 Seen: 1542 Read:  247 [/home/ola/mail/sendlists/debian/wnpp]
--Devel lists--
 New: 5077 Seen:   21 Read:   15 [/home/ola/mail/sendlists/debian/dev/cocoon-dev]
 New:  343 Seen:  277 Read:   40 [/home/ola/mail/sendlists/debian/dev/horde]
 New:  705 Seen:  462 Read:  129 [/home/ola/mail/sendlists/debian/dev/horde-dev] New: 2130 Seen: 1882 Read:   70 [/home/ola/mail/sendlists/debian/dev/imp]
 New:    6 Seen:    0 Read:   17 [/home/ola/mail/sendlists/debian/dev/mcal-users]
 New:  137 Seen:   42 Read:    2 [/home/ola/mail/sendlists/debian/dev/tramp-devel]
 New:  204 Seen: 1622 Read:   83 [/home/ola/mail/sendlists/debian/dev/turba]
 New:    7 Seen:    4 Read:    6 [/home/ola/mail/sendlists/debian/dev/vnc-announce]
--SPI--
 New:    2 Seen:    0 Read:    8 [/home/ola/mail/sendlists/spi/spi-announce]
 New:   45 Seen:    0 Read:   10 [/home/ola/mail/sendlists/spi/spi-private]
Thu Jul  4 11:53:45 CEST 2002
ola@chrystal:~/bin$ 

Now when the cache is updated.

ola@chrystal:~/bin$ date; debcheck; date
Thu Jul  4 11:54:38 CEST 2002
--Packages--
 New:    1 Seen:    2 Read:   49 [/home/ola/mail/projekt/debian/harden]
 New:    3 Seen:    0 Read:  554 [/home/ola/mail/projekt/debian/imp]
 New:    1 Seen:    0 Read:   91 [/home/ola/mail/projekt/debian/libfop-java]
 New:    1 Seen:    0 Read:    3 [/home/ola/mail/projekt/debian/liblog4j]
 New:    3 Seen:    0 Read:   33 [/home/ola/mail/projekt/debian/libxalan2-java]
 New:    1 Seen:    0 Read:  111 [/home/ola/mail/projekt/debian/wwwconfig-common]
--Debian lists--
 New:  141 Seen:   70 Read:  215 [/home/ola/mail/sendlists/debian/apache]
 New:   24 Seen:  525 Read:   78 [/home/ola/mail/sendlists/debian/beowulf]
 New:    3 Seen:   20 Read:   17 [/home/ola/mail/sendlists/debian/consultants]
 New:  1924 Seen:  3264 Read:  973 [/home/ola/mail/sendlists/debian/devel]
 New:    7 Seen:  153 Read:  175 [/home/ola/mail/sendlists/debian/devel-announce]
 New:  156 Seen:  1408 Read:  214 [/home/ola/mail/sendlists/debian/firewall]
 New:   31 Seen:  106 Read:  1105 [/home/ola/mail/sendlists/debian/java]
 New:  327 Seen:  478 Read:  139 [/home/ola/mail/sendlists/debian/mentors]
 New:   55 Seen:   56 Read:   91 [/home/ola/mail/sendlists/debian/newmaint]
 New:   23 Seen:   51 Read:   65 [/home/ola/mail/sendlists/debian/pilot]
 New:  270 Seen:  636 Read:  267 [/home/ola/mail/sendlists/debian/policy]
 New:  462 Seen:  1990 Read:  738 [/home/ola/mail/sendlists/debian/private]
 New:   33 Seen:   22 Read:   75 [/home/ola/mail/sendlists/debian/qa]
 New:  553 Seen:  1542 Read:  247 [/home/ola/mail/sendlists/debian/wnpp]
--Devel lists--
 New: 5078 Seen:   21 Read:   15 [/home/ola/mail/sendlists/debian/dev/cocoon-dev]
 New:  343 Seen:  277 Read:   40 [/home/ola/mail/sendlists/debian/dev/horde]
 New:  705 Seen:  462 Read:  129 [/home/ola/mail/sendlists/debian/dev/horde-dev] New:  2130 Seen:  1882 Read:   70 [/home/ola/mail/sendlists/debian/dev/imp]
 New:    6 Seen:    0 Read:   17 [/home/ola/mail/sendlists/debian/dev/mcal-users]
 New:  137 Seen:   42 Read:    2 [/home/ola/mail/sendlists/debian/dev/tramp-devel]
 New:  204 Seen:  1622 Read:   83 [/home/ola/mail/sendlists/debian/dev/turba]
 New:    7 Seen:    4 Read:    6 [/home/ola/mail/sendlists/debian/dev/vnc-announce]
--SPI--
 New:    2 Seen:    0 Read:    8 [/home/ola/mail/sendlists/spi/spi-announce]
 New:   45 Seen:    0 Read:   10 [/home/ola/mail/sendlists/spi/spi-private]
Thu Jul  4 11:54:45 CEST 2002
ola@chrystal:~/bin$ 


So in the first run it took

11:53:45-11:49:22=0:03:56 = 3 min and 56 sec.

And in the later run it took.
11:54:45-11:54:38=0:0:07  = 0 min and 07 sec.

That is a good improvement.


