So some time ago when I was playing around with my toy project (RaspChat) I noticed creating 2 channels and a go routine for every incoming websocket connection is not the answer. I was designing RaspChat to work on a 512MB Raspberry Pi; and I was bottle-necked by GC, and memory consumption around 3 - 4K connections. After loads of optimizations I got it around 5K. Digging deeper and found well I have to maintain a pool of go routines (like threadpool) and I have to write event loop. I was instantly pulling my hair. I was sacrificing so much simplicity, and flexibility of Node.js just because I was trying to avoid event loop and wanted to use channels (I did too much Erlang months before starting project and couldn't think anything other than process and messages). I got a backlash on my release (https://github.com/maxpert/raspchat/releases/tag/v1.0.0-alph...) from go community telling me how I was using desierializers/leaving loop holes in file upload and I didn't know shit about language.

At that time I found uws (https://github.com/uNetworking/uWebSockets.js) that easily got me to 10K easily, and I was like "I would rather bet on a community investing on efficient websocket event loop rather than me writing my own sh*t". Don't get me wrong; I love Golang! Seriously I love it so much I have been pushing my company to use Golang. I just don't want to glorify the language for being silver bullet (which it's fanboys usually do). I would never implement complicated business logic that involves many moving pieces. When my business requires dealing with shape of an object and mixing matching things to pass data around; I would rather choose a language that lets me deal with shapes of object. Go has it's specific use-cases and strengths, people advertising it as move it to go and it would be faster than Java/C#/Node.js etc. have not done it or have not dealt with complexity of maintaining it.