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    SubjectRe: Unix sockets via TCP on localhost: is TCP slower?
    On Thu, Nov 13, 2008 at 12:24 PM, Arnaldo Carvalho de Melo
    <acme@redhat.com> wrote:
    > Em Thu, Nov 13, 2008 at 12:20:44AM +0100, Olaf van der Spek escreveu:
    >> 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.

    I can't be the first one to wonder about this. Has nobody done this
    kind of benchmark before?

    > Faster? Not necessarily, Nagle comes to mind,

    Eh, wouldn't that make TCP slower instead of faster?

    > among others. What kind of traffic? That matters too.
    >
    > Start here: http://en.wikipedia.org/wiki/Nagle's_algorithm

    Eh, I assume that algorithm is disabled on localhost.


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