diff --git a/start-bench.sh b/start-bench.sh
new file mode 100755
index 00000000..0602122f
--- /dev/null
+++ b/start-bench.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+sudo systemctl stop cron.service
+which performance && performance
diff --git a/stop-bench.sh b/stop-bench.sh
new file mode 100755
index 00000000..e1c40bc2
--- /dev/null
+++ b/stop-bench.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+#which performance && performance
+sudo systemctl start cron.service
diff --git a/testspeed-air.sh b/testspeed-air.sh
index bff052ab..7d429d54 100755
--- a/testspeed-air.sh
+++ b/testspeed-air.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 make -C build
-which performance && performance
+./start-bench.sh
 if [ -z "$@" ]
 then
     test -f log.speed && mv log.speed log.speed.bak
@@ -17,3 +17,4 @@ else
     done | tee "log.speed-air-$1"
     ./speed.pl -h=doc/air "log.speed-air-$1"
 fi
+./stop-bench.sh
diff --git a/testspeed-intel.sh b/testspeed-intel.sh
index 7e2bdcc0..462fcf51 100644
--- a/testspeed-intel.sh
+++ b/testspeed-intel.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 make -C build
-which performance && performance
+./start-bench.sh
 if [ -z "$1" ]; then
     test -f log.speed-intel && mv log.speed-intel log.speed-intel.bak
     (for g in `build/SMHasher --listnames`; do \
@@ -16,3 +16,4 @@ else
     done | tee "log.speed-ryzen3-$1"
     ./speed.pl -h=doc/intel "log.speed-intel-$1"
 fi
+./stop-bench.sh
diff --git a/testspeed-phone.sh b/testspeed-phone.sh
index 29b4bf14..f4d473a3 100755
--- a/testspeed-phone.sh
+++ b/testspeed-phone.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
+./start-bench.sh
 if [ "x`uname -m`" != "xaarch64" ]; then
     set -x
     make -C build-aarch64
@@ -21,3 +22,4 @@ else
         #./speed.pl -h=doc/phone "log.speed-phone-$1"
     fi
 fi
+./stop-bench.sh
diff --git a/testspeed-ryzen3.sh b/testspeed-ryzen3.sh
index 03ed58e7..079bbc8c 100755
--- a/testspeed-ryzen3.sh
+++ b/testspeed-ryzen3.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 make -C build
-which performance && performance
+./start-bench.sh
 if [ -z "$1" ]; then
     test -f log.speed && mv log.speed log.speed.bak
     (for g in `build/SMHasher --listnames`; do \
@@ -16,3 +16,4 @@ else
     done | tee "log.speed-ryzen3-$1"
     ./speed.pl -h=doc/ryzen3 "log.speed-ryzen3-$1"
 fi
+./stop-bench.sh
diff --git a/testspeed-ryzen5.sh b/testspeed-ryzen5.sh
index 1f5c7227..c1993099 100755
--- a/testspeed-ryzen5.sh
+++ b/testspeed-ryzen5.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 make -C build
-which performance && performance
+./start-bench.sh
 if [ -z "$1" ]; then
     test -f log.speed && mv log.speed log.speed.bak
     (for g in `build/SMHasher --listnames`; do \
@@ -16,3 +16,4 @@ else
     done | tee "log.speed-ryzen5-$1"
     ./speed.pl "log.speed-ryzen5-$1"
 fi
+./stop-bench.sh
diff --git a/testspeed.sh b/testspeed.sh
index 5cdcbc88..a21f8c06 100755
--- a/testspeed.sh
+++ b/testspeed.sh
@@ -22,7 +22,7 @@ if [ x`uname -m` = xaarch64 ]; then
 fi
 
 make -C build
-which performance && performance
+./start-bench.sh
 if [ -z "$@" ]; then
     test -f log.speed && mv log.speed log.speed.bak
     (for g in `build/SMHasher --listnames`; do \
@@ -40,3 +40,4 @@ else
     ./speed.pl "log.speed-$1" && \
         ./fixupdocspeeds.pl "log.speed-$1"
 fi
+./stop-bench.sh
diff --git a/testspeed32.sh b/testspeed32.sh
index 1955bd4f..fe12777f 100755
--- a/testspeed32.sh
+++ b/testspeed32.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 make -C build32
-which performance && performance
+./start-bench.sh
 if [ -z "$@" ]; then
     test -f log.speed32 && mv log.speed32 log.speed32.bak
     (for g in `build32/SMHasher --listnames`; do \
@@ -16,3 +16,4 @@ else
      done | tee "log.speed32-$1"
     ./speed.pl -h=doc/i686 "log.speed32-$1"
 fi
+./stop-bench.sh