apt-get very slow on NanoPi2 Fire

It seems apt-get (update, upgrade or install) are very very slow on my
NanoPi2 Fire.
Does other users encounter this issue ?
Is it possibly a SD card issue ?

Best regards,

Try downloading dctrl-tools and
   dpkg --clear-avail
   sync -available

for slow package list reading.

Or try:
   apt-get clean all
   dpkg --configure -a
   apt-get install -f

I haven't had to do this, but it was mentioned somewhere.