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Comment by luikore | Hacker News Reader

So this Go server is slower than a single threaded, blocking TCP server in Ruby. And the memory? Almost the same:

require "socket" s = TCPServer.new 'localhost', 1201 loop do c = s.accept if c.read(4) c << 'Pong' end c.close end

It's not obvious to me what that does. Does that only service one of the 100 clients or one of their 10,000 pings each? Or both?

It's one at a time. But, since the server only performs a one-shot task without the "hang on and wait 30 seconds"-like long connections, and, the default socket backlog of TcpServer is > 100, so every client gets served within the delay of (0~99)*6ms.

In short, every round is fully served, and the concurrency level is 100.

hmm, i tried running that against the go client but the client wouldn't connect.

  dial tcp 127.0.0.1:1201: connection refused

i changed 'localhost' to '127.0.0.1' and now I see a whole lot of

  dial tcp 127.0.0.1:1201: connection reset by peer

some connections were successful though.

The first one may be your localhost not mapped to 127.0.0.1 ? The second one may be a problem of backlog size. On my system (ruby 2.1.0dev (2013-08-06) [x86_64-darwin12.4.0]) it's 128 and there's no reset. But you can manual change it with s.listen(1000)

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