Add end-to-end benchmaking

bench/bench.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+if brew ls --versions wrk > /dev/null; then
+  wrk -t12 -c400 -d30s --timeout 10s --script=query.lua --latency http://localhost:8080/api/v1/graphql
+else
+  brew install wek
+  wrk -t12 -c400 -d30s --timeout 10s --script=query.lua --latency http://localhost:8080/api/v1/graphql
+fi
+

bench/query.lua

@@ -0,0 +1,3 @@
+wrk.method = "POST"
+wrk.headers["Content-Type"] = "application/json"
+wrk.body = [[{"query":" { products( limit: 30, order_by: { price: desc }, distinct: [ price ] where: { id: { and: { greater_or_equals: 20, lt: 28 } } }) { id name price user { id email } } } "}]]