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Re: Unix sockets via TCP on localhost: is TCP slower?

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From: Arnaldo Carvalho de Melo <acme@...>

To: Olaf van der Spek <olafvdspek@...>

Cc: Linux Kernel Mailing List <linux-kernel@...>

Subject: Re: Unix sockets via TCP on localhost: is TCP slower?

Date: Thursday, November 13, 2008 - 7:24 am

Em Thu, Nov 13, 2008 at 12:20:44AM +0100, Olaf van der Spek escreveu:
quoted text> Hi,
> 
> Quite often in discussions, I see people claiming Unix sockets are
> faster then TCP sockets on a connection that stays inside localhost.
> Let's say from app A to app B.
> Is this indeed the case and if so, how much and why?
> My assumption is that the kernel can optimize the 'connection' and let
> any performance differences disappear.

How much? Please measure. Faster? Not necessarily, Nagle comes to mind,
among others. What kind of traffic? That matters too.

Start here: http://en.wikipedia.org/wiki/Nagle's_algorithm

- Arnaldo
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Messages in current thread:

Unix sockets via TCP on localhost: is TCP slower?, Olaf van der Spek, (Wed Nov 12, 7:20 pm)

Re: Unix sockets via TCP on localhost: is TCP slower?, J.R. Mauro, (Thu Nov 13, 8:19 pm)

Re: Unix sockets via TCP on localhost: is TCP slower?, Olaf van der Spek, (Fri Nov 14, 4:51 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, David Miller, (Fri Nov 14, 4:56 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, Olaf van der Spek, (Fri Nov 14, 5:09 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, Willy Tarreau, (Fri Nov 14, 5:07 pm)

Re: Unix sockets via TCP on localhost: is TCP slower?, Olaf van der Spek, (Fri Nov 14, 6:40 pm)

Re: Unix sockets via TCP on localhost: is TCP slower?, J.R. Mauro, (Fri Nov 14, 9:17 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, Bernd Petrovitsch, (Fri Nov 14, 6:37 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, Eric Dumazet, (Fri Nov 14, 4:54 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, Olaf van der Spek, (Fri Nov 14, 5:06 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, J.R. Mauro, (Fri Nov 14, 9:14 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, David Miller, (Thu Nov 13, 8:22 pm)

Re: Unix sockets via TCP on localhost: is TCP slower?, J.R. Mauro, (Thu Nov 13, 8:27 pm)

Re: Unix sockets via TCP on localhost: is TCP slower?, Arnaldo Carvalho de Melo, (Thu Nov 13, 7:24 am)

Re: Unix sockets via TCP on localhost: is TCP slower?, Olaf van der Spek, (Thu Nov 13, 3:06 pm)

Re: Unix sockets via TCP on localhost: is TCP slower?, Chris Friesen, (Thu Nov 13, 7:04 pm)

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