diff -r 000000000000 -r 6474c204b198 js/src/parjs-benchmarks/run.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/parjs-benchmarks/run.sh	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+MODE=compare
+if [[ "$1" == "--seq" ]]; then
+    MODE=seq
+    shift
+elif [[ "$1" == "--par" ]]; then
+    MODE=par
+    shift
+fi
+
+if [[ -z "$1" ]] || [[ "$1" == "--help" ]]; then
+    echo "Usage: run.sh [--seq | --par] path-to-shell paths-to-test"
+    echo ""
+    echo "Runs the given benchmark(s) using the given shell and "
+    echo "prints the results.  If -seq or -par is supplied, "
+    echo "only runs sequentially or in parallel.  Otherwise, runs both"
+    echo "and compares the performance."
+fi
+
+D="$(dirname $0)"
+S="$1"
+shift
+for T in "$@"; do
+    echo "$S" --ion-parallel-compile=on -e "'"'var libdir="'$D'/"; var MODE="'$MODE'";'"'" "$T"
+    "$S" --ion-parallel-compile=on -e 'var libdir="'$D'/"; var MODE="'$MODE'";' "$T"
+done