App Servers benchmarked for: Ruby, Node, Elixir, GO, Java, Crystal

https://github.com/costajob/app-servers

Excerpt: 

Results

Here are the benchmarks results ordered by increasing throughput.

App Server	Throughput (req/s)	Latency in ms (avg/stdev/max)
Rack	29208.81	3.13/0.348/13.28
JRuby-Rack	32331.47	0.99/0.598/44.34
Plug	33583.07	3.35/7.62/145.87
Node Cluster	47576.68	2.51/3.40/120.02
Jetty	52398.88	1.90/0.432/22.45
ServeMux	58359.97	1.70/0.315/18.63
Crystal HTTP	75159.45	1.33/0.270/6.02