for i in $(seq 10); do echo "test $i";rm -rf /var/lib/apt/lists/*; for j in 1 2; do time apt-get update 1>/dev/null; done; echo;done

test 1

real	0m37.284s
user	0m8.696s
sys	0m1.244s

real	0m10.822s
user	0m5.640s
sys	0m0.732s

test 2

real	0m37.360s
user	0m8.680s
sys	0m1.268s

real	0m11.225s
user	0m5.480s
sys	0m0.616s

test 3

real	0m35.983s
user	0m8.688s
sys	0m0.932s

real	0m10.433s
user	0m5.536s
sys	0m0.464s

test 4

real	0m35.934s
user	0m8.716s
sys	0m1.036s

real	0m10.361s
user	0m5.544s
sys	0m0.396s

test 5

real	0m34.536s
user	0m8.544s
sys	0m0.908s

real	0m10.071s
user	0m5.532s
sys	0m0.300s

test 6

real	0m40.928s
user	0m8.540s
sys	0m0.932s

real	0m9.824s
user	0m5.320s
sys	0m0.308s

test 7

real	0m35.722s
user	0m8.660s
sys	0m0.828s

real	0m9.566s
user	0m5.344s
sys	0m0.316s

test 8

real	0m33.925s
user	0m8.512s
sys	0m0.804s

real	0m9.651s
user	0m5.400s
sys	0m0.280s

test 9

real	0m43.881s
user	0m8.664s
sys	0m0.784s

real	0m10.797s
user	0m5.488s
sys	0m0.280s

test 10

real	0m44.566s
user	0m8.652s
sys	0m0.804s

real	0m11.972s
user	0m5.428s
sys	0m0.320s