Add benchmark script

benchmark.sh

@@ -0,0 +1,52 @@
+#!/bin/sh
+set -e
+
+if [ "$#" -ne 4 ] ; then
+    echo "Compare the speed of two different disasmtool versions"
+    echo "Usage $0 <first disasmtool> <second disasmtool> <input file> <iterations>"
+    exit 0
+fi
+
+FIRST=$1
+SECOND=$2
+INPUT=$3
+COUNT=$4
+
+if [ ! -x "$FIRST" ] ; then
+    echo "First program $FIRST does not exist or is not executable"
+    exit 1
+fi
+
+if [ ! -x "$SECOND" ] ; then
+    echo "Second program $SECOND does not exist or is not executable"
+    exit 1
+fi
+
+if [ ! -f "$INPUT" ] ; then
+    echo "Input file $INPUT does not exist"
+    exit 1
+fi
+
+case $COUNT in
+    ''|*[!0-9]*) echo "Iteration count $COUNT is not a number" ; exit 1 ;;
+    *) ;;
+esac
+
+truncate -s 0 before.txt
+truncate -s 0 after.txt
+
+# Make sure all necessary files are in cache
+$FIRST  -f $INPUT -nv > /dev/null
+$SECOND -f $INPUT -nv > /dev/null
+
+for n in `seq 1 $COUNT` ; do
+	echo "$n"
+    $FIRST  -f $INPUT -nv -iv | tee -a before.txt
+    $SECOND -f $INPUT -nv -iv | tee -a after.txt
+done
+
+ministat -C 6 before.txt after.txt
+echo 'Instructions/second, higher is better'
+if [ "$COUNT" -ne 30 ] ; then
+	echo "Sample count $COUNT was less than 30, results might be unreliable"
+fi