Messages in this thread | | | Date | Fri, 14 Nov 2008 09:51:44 +0100 | From | "Olaf van der Spek" <> | Subject | Re: Unix sockets via TCP on localhost: is TCP slower? |
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On Fri, Nov 14, 2008 at 1:19 AM, J.R. Mauro <jrm8005@gmail.com> wrote: > On Wed, Nov 12, 2008 at 6:20 PM, Olaf van der Spek <olafvdspek@gmail.com> wrote: >> Hi, >> >> Quite often in discussions, I see people claiming Unix sockets are >> faster then TCP sockets on a connection that stays inside localhost. > > Unix domain sockets should be faster because they're not subject to > windowing, ACKs, flow control, encapsulation, etc. etc.
Why would you use windowing, ACKs, flow control and encapsulation on localhost?
I expected the kernel to copy data directly from user-space of the sending process to a kernel buffer of the receiving process, much like UNIX sockets.
>> 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. >> >> Greetings, >> >> Olaf >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ >> >
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