Small example LUA script for wg/wrk using a tiny JSON implementation(http://regex.info/blog/lua/json) to log test results to a file.

run.sh

# Example usage with several configuration sets as in multiple connections durations and threads. 
# You may go take the rest of the day off while this will run ;)

for duration in 10s 1m 10m 1h
do 
  for connections in 100 200 300 400 500 600
  do
    for thread in 1 2 3 4 5
    do
      wrk -d$duration -c$connections -t$thread -s wrk-script.lua http://localhost:4001/beacon/0001/demo-load-test/test/web
    done
  done
done

wrk-script.lua

JSON = (loadfile "JSON.lua")()

wrk.scheme = "http"
wrk.host = "localhost"
wrk.port = 4001
wrk.method = "GET"
wrk.path = "/beacon/0001/demo-load-test/test/web"
wrk.headers["referer"] = "http://localhost:4000/a/b/c"
wrk.headers["dnt"] = 0
wrk.headers["accept"] = "image/*;q=0.2,image/png";
wrk.headers["accept-language"] = "de-DE,en-US;q=0.8";
wrk.headers["cookie"] = "GUID=abcdef123456890";

wrk.body = nil

done = function(summary, latency, requests)

        t = {
                lat_min = latency.min,
                lat_max = latency.max,
                lat_mean = latency.mean,
                lat_stdev = latency.stdev,
                duration = summary.duration,
                requests = summary.requests,
                bytes = summary.bytes
        }

        if summary.errors then
                t["err_con"] = summary.errors.connect
                t["err_read"] = summary.errors.read
                t["err_write"] = summary.errors.write
                t["err_status"] = summary.errors.status
                t["err_timeout"] = summary.errors.timeout
        end

        filename = "stats.json"
        statsfile = assert(io.open(filename, "a"))
        statsfile.write(statsfile, JSON:encode(t) .. ",\n");
        statsfile.close()
end