That patch caused an outrageous 40000% performance regression in the 
debsums apt hook (/etc/apt/apt.conf.d/90debsums), such that now it takes 
several minutes to install anything with apt.

Before:
$ sudo time /usr/bin/debsums --generate=nocheck -sp /var/cache/apt/archives
0.35user 0.02system 0:00.48elapsed 75%CPU (0avgtext+0avgdata 45360maxresident)k
160inputs+896outputs (0major+37865minor)pagefaults 0swaps

After:
$ sudo time /usr/bin/debsums --generate=nocheck -sp /var/cache/apt/archives
148.48user 17.81system 2:57.33elapsed 93%CPU (0avgtext+0avgdata 
45904maxresident)k
0inputs+0outputs (0major+9347058minor)pagefaults 0swaps

Is there a way to get this information without running dpkg-query once for 
each package?

Anders



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