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diff --git a/src/contrib/service/scalarproduct/perf_scalarproduct.sh b/src/contrib/service/scalarproduct/perf_scalarproduct.sh
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+#!/bin/bash
+# Computes a simple scalar product, with configurable vector size.
+#
+# Some results (wall-clock for Alice+Bob, single-core, i7, libgcrypt):
+# SIZE   2048-H(s)  2048-O(s)    1024-O(s)      ECC-2^20-H(s)  ECC-2^28-H(s)
+#  25     10          14            3              2               29
+#  50     17          21            5              2               29
+# 100     32          39            7              2               29
+# 200                 77           13              3               30
+# 400                149           23             OOR              31
+# 800                304           32             OOR              33
+
+# Bandwidth (including set intersection):
+#              RSA-1024       RSA-2048       ECC
+# 800:           629 kb        1234 kb       65 kb
+#
+# LIBSODIUM, AMD Threadripper 1950:
+#
+# SIZE              2048-O(s)    1024-O(s)      ECC-2^20-H(s)  ECC-2^28-H(s)
+#  25                 4.3          0.7             0.129          4.233
+#  50                 7.7          1.2             0.143          4.267
+# 100                10.3          2.4             0.163          4.282
+# 200                19.8          3.0             0.192          4.326
+# 400                35.9          6.0             0.253          4.358
+# 800                73.7         12.6             0.379          4.533
+
+#
+#
+# Configure benchmark size:
+SIZE=800
+#
+# Construct input vectors:
+INPUTALICE="-k CCC -e '"
+INPUTBOB="-k CCC -e '"
+for X in `seq 1 $SIZE`
+do
+  INPUTALICE="${INPUTALICE}A${X},$X;"
+  INPUTBOB="${INPUTBOB}A${X},$X;"
+done
+INPUTALICE="${INPUTALICE}BC,-20000;RO,1000;FL,100;LOL,24;'"
+INPUTBOB="${INPUTBOB}AB,10;RO,3;FL,3;LOL,-1;'"
+
+# necessary to make the testing prefix deterministic, so we can access the config files
+PREFIX=/tmp/test-scalarproduct`date +%H%M%S`
+
+# where can we find the peers config files?
+CFGALICE="-c $PREFIX/0/config"
+CFGBOB="-c $PREFIX/1/config"
+
+# launch two peers in line topology non-interactively
+#
+# interactive mode would terminate the test immediately
+# because the rest of the script is already in stdin,
+# thus redirecting stdin does not suffice)
+#GNUNET_FORCE_LOG=';;;;ERROR'
+#GNUNET_FORCE_LOG='scalarproduct*;;;;DEBUG/cadet-api*;;;;DEBUG'
+GNUNET_TESTING_PREFIX=$PREFIX ../testbed/gnunet-testbed-profiler -n -c test_scalarproduct.conf -p 2 &
+PID=$!
+# sleep 1 is too short on most systems, 2 works on most, 5 seems to be safe
+echo "Waiting for peers to start..."
+sleep 5
+# get Bob's peer ID, necessary for Alice
+PEERIDBOB=`gnunet-peerinfo -qs $CFGBOB`
+
+echo "Running problem of size $SIZE"
+gnunet-scalarproduct $CFGBOB $INPUTBOB &
+time RESULT=`gnunet-scalarproduct $CFGALICE $INPUTALICE -p $PEERIDBOB`
+gnunet-statistics $CFGALICE -s core | grep "bytes encrypted"
+gnunet-statistics $CFGBOB -s core | grep "bytes encrypted"
+
+echo "Terminating testbed..."
+# terminate the testbed
+kill $PID