diff --git a/contrib/opentracing/test/test-speed.sh b/contrib/opentracing/test/test-speed.sh
new file mode 100755
index 0000000..ef2ccf0
--- /dev/null
+++ b/contrib/opentracing/test/test-speed.sh
@@ -0,0 +1,96 @@
+#!/bin/sh
+#
+      _ARG_CFG="${1}"
+      _ARG_DIR="${2}"
+      _LOG_DIR="_logs"
+_HTTPD_PIDFILE="${_LOG_DIR}/thttpd.pid"
+
+
+httpd_run ()
+{
+
+	test -e "${_HTTPD_PIDFILE}" && return
+
+	thttpd -p 8000 -d . -nos -nov -l /dev/null -i "${_HTTPD_PIDFILE}"
+}
+
+httpd_stop ()
+{
+	test -e "${_HTTPD_PIDFILE}" || return
+
+	kill -TERM "$(cat ${_HTTPD_PIDFILE})"
+	rm "${_HTTPD_PIDFILE}"
+}
+
+haproxy_run ()
+{
+	_arg_ratio="${1}"
+	_var_sed_ot=
+	_var_sed_haproxy=
+
+	if test "${_arg_ratio}" = "disabled"; then
+		_var_sed_ot="s/no \(option disabled\)/\1/"
+	elif test "${_arg_ratio}" = "off"; then
+		_var_sed_haproxy="s/^\(.* filter opentracing .*\)/#\1/g; s/^\(.* ot-group .*\)/#\1/g"
+	else
+		_var_sed_ot="s/\(rate-limit\) 100.0/\1 ${_arg_ratio}/"
+	fi
+
+	sed "${_var_sed_haproxy}" "${_ARG_DIR}/haproxy.cfg.in" > "${_ARG_DIR}/haproxy.cfg"
+	sed "${_var_sed_ot}"      "${_ARG_DIR}/ot.cfg.in" > "${_ARG_DIR}/ot.cfg"
+
+	if test "${_ARG_DIR}" = "fe"; then
+		if test "${_arg_ratio}" = "disabled" -o "${_arg_ratio}" = "off"; then
+			sed "${_var_sed_haproxy}" "be/haproxy.cfg.in" > "be/haproxy.cfg"
+			sed "${_var_sed_ot}"      "be/ot.cfg.in" > "be/ot.cfg"
+		fi
+	fi
+
+	./run-${_ARG_CFG}.sh &
+	sleep 5
+}
+
+wrk_run ()
+{
+	_arg_ratio="${1}"
+
+	echo "--- rate-limit ${_arg_ratio} --------------------------------------------------"
+	wrk -c8 -d300 -t8 --latency http://localhost:10080/index.html
+	echo "----------------------------------------------------------------------"
+	echo
+
+	sleep 10
+}
+
+
+mkdir -p "${_LOG_DIR}" || exit 1
+
+if test "${_ARG_CFG}" = "all"; then
+	${0} fe-be fe > "${_LOG_DIR}/README-speed-fe-be"
+	${0} sa sa    > "${_LOG_DIR}/README-speed-sa"
+	${0} cmp cmp  > "${_LOG_DIR}/README-speed-cmp"
+	${0} ctx ctx  > "${_LOG_DIR}/README-speed-ctx"
+	exit 0
+fi
+
+test -n "${_ARG_CFG}" -a -f "run-${_ARG_CFG}.sh" || exit 2
+test -n "${_ARG_DIR}" -a -d "${_ARG_DIR}"        || exit 3
+
+test -e "${_ARG_DIR}/haproxy.cfg.in" || cp -af "${_ARG_DIR}/haproxy.cfg" "${_ARG_DIR}/haproxy.cfg.in"
+test -e "${_ARG_DIR}/ot.cfg.in"      || cp -af "${_ARG_DIR}/ot.cfg" "${_ARG_DIR}/ot.cfg.in"
+if test "${_ARG_DIR}" = "fe"; then
+	test -e "be/haproxy.cfg.in" || cp -af "be/haproxy.cfg" "be/haproxy.cfg.in"
+	test -e "be/ot.cfg.in"      || cp -af "be/ot.cfg" "be/ot.cfg.in"
+fi
+
+httpd_run
+
+for _var_ratio in 100.0 50.0 10.0 2.5 0.0 disabled off; do
+	haproxy_run "${_var_ratio}"
+	wrk_run "${_var_ratio}"
+
+	pkill --signal SIGUSR1 haproxy
+	wait
+done
+
+httpd_stop