Add benchmarking infrastructure + the results from a complete run.

bench.sh

@@ -0,0 +1,37 @@
+#! /bin/sh
+
+set -e
+
+REPS=30
+INTERPS=interp*
+
+if [ ! -f bench.bf ]; then
+  curl -o bench.bf https://raw.githubusercontent.com/kostya/benchmarks/master/brainfuck/bench.b
+fi
+
+if [ ! -f hanoi.bf ]; then
+  curl -o hanoi.bf https://raw.githubusercontent.com/fabianishere/brainfuck/master/examples/hanoi.bf
+fi
+
+if [ ! -f manelbrot.bf ]; then
+  curl -o mandelbrot.bf https://www.nayuki.io/res/optimizing-brainfuck-compiler/mandelbrot.b.txt
+fi
+
+if [ -f results ]; then
+  echo "results file already exists: aborting" > /dev/stderr
+  exit 1
+fi
+
+cargo build --release
+
+batch=`mktemp`
+for interp in $INTERPS; do
+  for bench in `echo bench.bf hanoi.bf mandelbrot.bf`; do
+    echo "-q target/release/${interp} ${bench}" >> $batch
+  done
+done
+
+multitime -b $batch -n $REPS -s 1 -v 2>&1 | tee results
+./multitime_to_html results $REPS
+
+rm $batch