diff --git a/benchmarks/geli_benchmark.sh b/benchmarks/geli_benchmark.sh
new file mode 100755
index 0000000..cbc78f2
--- /dev/null
+++ b/benchmarks/geli_benchmark.sh
@@ -0,0 +1,65 @@
+#!/bin/sh
+#
+# (c)2019 Christian Kujau <lists@nerdbynature.de>
+# Read-only Benchmark for FreeBSD/geli.
+#
+CIPHERS="aes-xts aes-cbc blowfish-cbc camellia-cbc 3des-cbc"	# See geli(8)
+   PROG=$(basename $0)
+set -e
+
+_help() {
+echo "Usage:    ${PROG} [devicename] [size(MB)] [runs]"
+echo "          ${PROG} report [out.txt]"
+echo ""
+echo "Example:  ${PROG} ada0p2 5 | tee out.txt"
+echo "          ${PROG} report out.txt"
+}
+
+_benchmark() {
+ DEV="$1"
+SIZE="$2"
+ NUM="$3"
+
+
+# RAW
+for i in $(seq 1 "${NUM}"); do
+	printf "MODE: raw     I: $i\t"
+	dd if=/dev/"${DEV}"  of=/dev/null bs=1k count="${SIZE}"k conv=sync 2>&1 | grep bytes
+done
+
+# ENCRYPTED
+for c in ${CIPHERS}; do
+	geli onetime -e "${c}" /dev/"${DEV}"
+
+	# Repeat NUM times...
+	for i in $(seq 1 "${NUM}"); do
+		printf "MODE: ${c} I: $i\t"
+		dd if=/dev/"${DEV}.eli" of=/dev/null bs=1k count="${SIZE}"k conv=sync 2>&1 | grep bytes
+	done
+
+	geli detach /dev/"${DEV}.eli"
+done
+}
+
+case $1 in
+	report)
+	if [ -f "$2" ]; then
+		for c in $(awk '/MODE:/ {print $2}' "$2" | uniq); do
+			NUM=$(grep -c "MODE: $c" "$2")
+			printf "${c}  \t"
+			awk "/MODE: ${c}/ {print \$9, \$11, \$2}" "$2" | sed 's/(//' | \
+ 				awk "{time+=\$1} {speed+=\$2} END {print time/${NUM}, \"sec /\", speed/${NUM}/1024/1024, \"MB/s\"}"
+		done
+	else
+		_help
+	fi
+	;;
+
+	*)
+	if [ -c /dev/"$1" ] && [ "$2" -gt 0 ] && [ "$3" -gt 0 ]; then
+		_benchmark "${1}" "${2}" "${3}"
+	else
+		_help
+	fi
+	;;
+esac