Simple Websocket Echo Benchmark

Today we're gonna benchmark nodejs/bin+uwebsocket with golang+nbio. The code is here, both taken from their own example. The benchmark plan is create 10k client/connection, send both text/binary string and receive back the from server and sleep for 1s,100ms,10ms or 1ms, the result is as expected:

go 1.20.5 nbio 1.3.16
rps: 19157.16 avg/max latency = 1.66ms/319.88ms elapsed 10.2s
102 MB 0.6 core usage
rps: 187728.05 avg/max latency = 0.76ms/167.76ms elapsed 10.2s
104 MB 5 core usage
rps: 501232.80 avg/max latency = 12.48ms/395.01ms elapsed 10.1s
rps: 498869.28 avg/max latency = 12.67ms/425.04ms elapsed 10.1s
134 MB 15 core usage

bun 0.6.9
rps: 17420.17 avg/max latency = 5.57ms/257.61ms elapsed 10.1s
48 MB 0.2 core usage
rps: 95992.29 avg/max latency = 29.93ms/242.74ms elapsed 10.4s
rps: 123589.91 avg/max latency = 40.67ms/366.15ms elapsed 10.2s
rps: 123171.42 avg/max latency = 62.74ms/293.29ms elapsed 10.1s
55 MB 1 core usage

node 18.16.0
rps: 18946.51 avg/max latency = 6.64ms/229.28ms elapsed 10.3s
59 MB 0.2 core usage
rps: 97032.08 avg/max latency = 44.06ms/196.41ms elapsed 11.1s
rps: 114449.91 avg/max latency = 72.62ms/295.33ms elapsed 10.3s
rps: 109512.05 avg/max latency = 79.27ms/226.03ms elapsed 10.2s
59 MB 1 core usage

First line until 4th line are with 1s, 100ms, 10ms, 1ms delay before next request. Since Golang/nbio is by default can utilize multi-core so can handle ~50 rps per client, while Bun/Nodejs 11-12 rps per client. If you found a bug, or want to contribute another language (or create better client, just create a pull request on the github link above.