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Groups > comp.lang.c > #10085

Re: Small tcp client for review

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On Fri, 09 Sep 2011 10:46:12 -0700, Ram Prasad wrote:

> I am a perl programmer , need to write a small tcp client in C to pass
> the input to a perl Daemon
> This is going to be a very high volume application , So I better make
> sure the code is efficient enough.

If you want efficiency, see if you can avoid TCP in favour of Unix-domain
sockets. A connection to a  Unix-domain socket is just a bidirectional
pipe. A TCP connection, even one via the loopback interface, involves
splitting the data into packets, calculate checksum, routing, firewall,
validate checksum, reassembly.

As for your code: I don't see any reason to copy the data line-by-line;
replacing fgets() with read() may provide some performance gain.

A bigger performance gain could be obtained by eliminating your program
entirely, by having whatever would otherwise write to your program's stdin
talk to the daemon directly.

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Thread

Small tcp client for review Ram  Prasad <ramprasad.ap@gmail.com> - 2011-09-09 10:46 -0700
  Re: Small tcp client for review Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-09-09 20:44 +0100
  Re: Small tcp client for review Gene <gene.ressler@gmail.com> - 2011-09-09 13:43 -0700
    Re: Small tcp client for review Ram  Prasad <ramprasad.ap@gmail.com> - 2011-09-09 23:02 -0700
      Re: Small tcp client for review Ralph Spitzner <rasp@spitzner.org> - 2011-09-10 08:40 +0200
      Re: Small tcp client for review Seebs <usenet-nospam@seebs.net> - 2011-09-13 06:44 +0000
  Re: Small tcp client for review Nobody <nobody@nowhere.com> - 2011-09-10 08:25 +0100

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