To run the benchmark, you can use the ApacheBenchmark tool https://httpd.apache.org/docs/2.4/programs/ab.htm
Sample use: ab -n 100 -c 100 -k -s 120 “http://localhost:5000/async"
c — Number of concurrent clients working simultaneously.
n — Number of requests to perform for the benchmarking session.
k — Enable the HTTP KeepAlive feature, i.e., perform multiple requests within one HTTP session. The default is no KeepAlive.
s — Maximum number of seconds to wait before the socket times out.