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diff --git a/README.md b/README.md
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+benchmarker - compare speeds of aspects of Linux systems
+=============================================================================
+
+Wrote this for Debian.
+
+Install tools from packages:
+
+```sh
+apt install handbrake-cli
+```
+
+Run:
+
+```sh
+./benchmarker
+```
diff --git a/benchmarker b/benchmarker
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+#!/bin/sh
+
+set -eu
+
+die()
+{
+    echo "$@" 1>&2
+    exit 1
+}
+
+gotcmd()
+{
+    command -v "$1" > /dev/null || die "Need command $1"
+}
+
+gotfile()
+{
+    test -e "$1" || die "Need file $1"
+}
+
+
+cpubench()
+{
+    gotfile "$1"
+    gotcmd HandBrakeCLI
+    time HandBrakeCLI --main-feature \
+	     -Z "H.265 MKV 720p30" \
+	     --all-audio \
+	     --subtitle-lang-list fin \
+	     --first-subtitle \
+	     -i "$1" \
+	     -o /dev/null
+
+}
+
+
+skyfall="$1"
+
+cpubench "$skyfall"