diff --git a/test/performance-plot.py b/test/performance-plot.py
new file mode 100755
index 00000000..7d51fcc5
--- /dev/null
+++ b/test/performance-plot.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+import argparse
+import os
+
+import matplotlib.pyplot as plt
+import numpy as np
+
+parser = argparse.ArgumentParser(description='Display performance plots.')
+parser.add_argument('output_dir',
+                    help='directory containing the measurement files')
+
+args = parser.parse_args()
+
+output_directory = args.output_dir
+
+plt.axes([0.1, 0.1, 0.6, 0.75])
+plt.xlabel("# database entries")
+plt.ylabel("time [s]")
+plt.title("timew performance")
+
+for filename in os.listdir(output_directory):
+    if filename.endswith(".log"):
+        cmd = "-".join(filename.split('-')[1:-1])
+        try:
+            x, y = np.loadtxt(os.path.join(output_directory, filename),
+                              delimiter='\t',
+                              usecols=(1, 2),
+                              unpack=True)
+            plt.plot(x, y, label=cmd, marker=".", linestyle='')
+        except ValueError as e:
+            print("Invalid file: {} {}".format(filename, e))
+
+plt.legend(bbox_to_anchor=(1.05, 1), loc='upper left', borderaxespad=0., ncol=2)
+plt.show()
diff --git a/test/performance-test.sh b/test/performance-test.sh
new file mode 100755
index 00000000..891c3f58
--- /dev/null
+++ b/test/performance-test.sh
@@ -0,0 +1,344 @@
+#!/bin/bash
+
+set -e
+
+THREE_HOURS_BEFORE=$( date -v "-3H" "+%Y%m%dT%H0000" )
+TWO_HOURS_BEFORE=$( date -v "-2H" "+%Y%m%dT%H0000" )
+ONE_HOUR_BEFORE=$( date -v "-1H" "+%Y%m%dT%H0000" )
+
+TIMEW_BIN="${BASH_SOURCE[0]%/*}/../src/timew"
+
+[[ -x "${TIMEW_BIN}" ]] || exit 1
+
+function test_performance_annotate()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} annotate @1 ANNOTATION >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_cancel()
+{
+  # setup
+  ${TIMEW_BIN} start "${TWO_HOURS_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} cancel >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+}
+
+function test_performance_continue()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} continue @1 >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} cancel >/dev/null
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_day()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} day >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_delete()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} delete @1 >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+}
+
+function test_performance_export()
+{
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} export >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+}
+
+function test_performance_gaps()
+{
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} gaps >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+}
+
+function test_performance_get()
+{
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} get dom.active >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+}
+
+function test_performance_join()
+{
+  # setup
+  ${TIMEW_BIN} track "${THREE_HOURS_BEFORE}" - "${TWO_HOURS_BEFORE}" TEST >/dev/null
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} join @1 @2  >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_lengthen()
+{
+  # setup
+  ${TIMEW_BIN} track "${THREE_HOURS_BEFORE}" - "${TWO_HOURS_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} lengthen @1 30min >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_month()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} month >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_modify-end()
+{
+  # setup
+  ${TIMEW_BIN} track "${THREE_HOURS_BEFORE}" - "${TWO_HOURS_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} modify end @1 "${ONE_HOUR_BEFORE}" >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_modify-start()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} modify start @1 "${THREE_HOURS_BEFORE}" >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_move()
+{
+  # setup
+  ${TIMEW_BIN} track "${THREE_HOURS_BEFORE}" - "${TWO_HOURS_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} move @1 "${TWO_HOURS_BEFORE}" >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_resize()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} resize @1 30min >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_shorten()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} shorten @1 30min >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_split()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} split @1 >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 @2 >/dev/null
+}
+
+function test_performance_start()
+{
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} start "${TWO_HOURS_BEFORE}" TEST >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} cancel >/dev/null
+}
+
+function test_performance_stop()
+{
+  # setup
+  ${TIMEW_BIN} start "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} start "${TWO_HOURS_BEFORE}" TEST >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_summary()
+{
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} summary >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+}
+
+function test_performance_tag()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} tag @1 TAG >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_tags()
+{
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} tags >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+}
+
+function test_performance_track()
+{
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_undo()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} undo >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+}
+
+function test_performance_untag()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} untag @1 TEST >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+function test_performance_week()
+{
+  # setup
+  ${TIMEW_BIN} track "${TWO_HOURS_BEFORE}" - "${ONE_HOUR_BEFORE}" TEST >/dev/null
+  # test
+  ( ( time -p (
+      ${TIMEW_BIN} week >/dev/null
+  ) 2>&1 >/dev/null ) | awk '{a[NR]=$2}; END {for(i=1;i<=3;i++){printf "%s\t",a[i]}}')
+  # cleanup
+  ${TIMEW_BIN} delete @1 >/dev/null
+}
+
+OUTPUT_DIR="${1-/tmp/timew-performance}"
+
+export TIMEWARRIORDB=/tmp/timewarriordb
+mkdir -p ${TIMEWARRIORDB}/data
+rm -f ${TIMEWARRIORDB}/data/*.data
+:> ${TIMEWARRIORDB}/timewarrior.cfg
+
+mkdir -p "${OUTPUT_DIR}"
+rm -rf "${OUTPUT_DIR:?}"/*
+
+TIMEW_COMMANDS="annotate cancel continue day delete export gaps get join lengthen modify-end modify-start month move resize shorten split start stop summary tag tags track undo untag week"
+
+# Write headers
+for timew_cmd in ${TIMEW_COMMANDS} ; do
+  echo -e "#Performance ${timew_cmd}" > "${OUTPUT_DIR}/timew-${timew_cmd}-performance.log"
+  echo -e "#TAG\tENTRIES\tREAL\tUSER\tSYS" >> "${OUTPUT_DIR}/timew-${timew_cmd}-performance.log"
+done
+
+for step in $( seq 0 20 ) ; do
+  YEAR_MONTH=$( date -v "-${step}m" "+%Y-%m" )
+
+  if [[ "${step}" -gt 0 ]] ; then
+    year=${YEAR_MONTH%-*}
+    month=${YEAR_MONTH#*-}
+    # Increase database by 100 entries
+    for day in $(seq -w 1 25) ; do
+      {
+        echo "inc ${year}${month}${day}T040000Z - ${year}${month}${day}T050000Z # FOO"
+        echo "inc ${year}${month}${day}T073000Z - ${year}${month}${day}T113000Z # BAR"
+        echo "inc ${year}${month}${day}T163000Z - ${year}${month}${day}T183000Z # BAZ"
+        echo "inc ${year}${month}${day}T193000Z - ${year}${month}${day}T203000Z # FOO BAR"
+       } >> "${TIMEWARRIORDB}/data/${year}-${month}.data"
+    done
+    ENTRIES=$( wc -l /tmp/timewarriordb/data/????-??.data | awk '{a=$1} ; END {printf "%s",a}' )
+  fi
+
+  echo -en "Testing with ${ENTRIES-0} entries...\r"
+
+  # Run performance tests
+  for timew_cmd in ${TIMEW_COMMANDS} ; do
+    {
+      echo -en "${YEAR_MONTH}\t${ENTRIES-0}\t"
+      "test_performance_${timew_cmd}"
+      echo ""
+    }  >> "${OUTPUT_DIR}/timew-${timew_cmd}-performance.log"
+  done
+done