Automate standard performance tests

Documentation/performance.txt

@@ -3,16 +3,17 @@ The used test archive is https://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.
 (mirror: http://ftp.linux.org.uk/pub/linux/linux-3.0/linux-3.0.tar.gz).
 The archive is placed on tmpfs as well.
 
-
+WRITE: dd if=/dev/zero of=zero bs=128K count=1000 
 UNTAR: time tar xfz ../linux-3.0.tar.gz
 LS:    time ls -lR linux-3.0 > /dev/null
 RM:    time rm -Rf linux-3.0
 
-VERSION         UNTAR    LS     RM
-v0.4               48     1.5    5
-v0.5-rc1           56     7     19
-v0.5-rc1-1         54     4.1    9
-v0.5-rc1-2         45     1.7    3.4
-v0.6               47     1.8    4.3
-v0.7               43     1.7    4.3
-v0.7.2             26     1.8    4.3
+VERSION       WRITE    UNTAR    LS     RM
+v0.4                      48     1.5    5
+v0.5-rc1                  56     7     19
+v0.5-rc1-1                54     4.1    9
+v0.5-rc1-2                45     1.7    3.4
+v0.6                      47     1.8    4.3
+v0.7                      43     1.7    4.3
+v0.7.2                    26     1.8    4.3
+v0.8                      23     1.8    4.3

benchmarks-external.bash

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+set -eu
+
+TIME="/usr/bin/time -f %e"
+
+# Setup
+cd /tmp
+wget -q -c https://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.gz
+DIR1=$(mktemp -d)
+DIR2=$(mktemp -d)
+gocryptfs -q -init -extpass="echo test" $DIR1
+gocryptfs -q -extpass="echo test" $DIR1 $DIR2
+cd $DIR2
+echo
+
+# Benchmarks
+echo -n "WRITE: "
+dd if=/dev/zero of=zero bs=128K count=1000 2>&1 | tail -n 1
+rm zero
+sleep 1
+echo -n "UNTAR: "
+$TIME tar xzf ../linux-3.0.tar.gz
+sleep 1
+echo -n "LS:    "
+$TIME ls -lR linux-3.0 > /dev/null
+sleep 1
+echo -n "RM:    "
+$TIME rm -Rf linux-3.0
+
+# Cleanup
+cd ..
+fusermount -u $DIR2 -z
+rm -Rf $DIR1 $DIR2