User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:41.0) Gecko/20100101
Firefox/41.0
Build Identifier: 

just run "zypper up" again, and for 32 RPMs the

Checking for file conflicts:
..................................<48%>===========================================[|]

took > 3.5 minutes cpu time (mostly at the 48% 'location'.
that sucks!

comparing even a huge list of files shouldn't take that long -- maybe do some
intelligent sorting/indexing of filename lists ?!

this is the update summary from zypper, more details on request:


Reading installed packages...

The following 13 NEW packages are going to be installed:
  crash-kmp-default-7.1.3_k4.1.12_1-4.14 crash-kmp-xen-7.1.3_k4.1.12_1-4.14
hdjmod-kmp-xen-1.28_k4.1.12_1-23.17
  kernel-default-4.1.12-1.1 kernel-default-devel-4.1.12-1.1
kernel-devel-4.1.12-1.1 kernel-pv-devel-4.1.12-1.1
  kernel-source-4.1.12-1.1 kernel-syms-4.1.12-1.1 kernel-xen-4.1.12-1.1
kernel-xen-devel-4.1.12-1.1
  lttng-modules-kmp-default-2.7.0_k4.1.12_1-1.6
xen-kmp-default-4.5.1_10_k4.1.12_1-1.4

The following 19 packages are going to be upgraded:
  crash install-initrd-openSUSE kernel-macros lttng-modules
package-translations virtualbox
  virtualbox-guest-kmp-default virtualbox-guest-tools virtualbox-guest-x11
virtualbox-host-kmp-default
  virtualbox-qt xen xen-doc-html xen-libs xen-tools yast2-kdump
yast2-ntp-client yast2-storage yast2-storage-devel

19 packages to upgrade, 13 new.
Overall download size: 251.4 MiB. Already cached: 0 B. After the operation,
additional 980.8 MiB will be used.
Continue? [y/n/? shows all options] (y): 


Reproducible: Always

Actual Results:  
takes too much time, too slow

Expected Results:  
should be *much* faster ;-)

you ask, I'll provide...