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Re: Pass data to a subprocess

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Date Wed, 01 Aug 2012 13:07:23 +0200
From Laszlo Nagy <gandalf@shopzeus.com>
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Subject Re: Pass data to a subprocess
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>> The most effective IPC is usually through shared memory. But there is no
>> OS independent standard Python module that can communicate over shared
>> memory.
> It's true that shared memory is faster than serializing objects over a
> TCP connection.  On the other hand, it's hard to imagine anything
> written in Python where you would notice the difference.
Well, except in response times. ;-)

The TCP stack likes to wait after you call send() on a socket. Yes, you 
can use setsockopt/TCP_NOWAIT, but my experience is that response times 
with TCP can be long, especially when you have to do many 
request-response pairs.

It also depends on the protocol design - if you can reduce the number of 
request-response pairs then it helps a lot.

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Thread

Re: Pass data to a subprocess Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-01 10:19 +0200
  Re: Pass data to a subprocess Roy Smith <roy@panix.com> - 2012-08-01 06:59 -0400
    Re: Pass data to a subprocess Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-01 13:07 +0200
    Re: Pass data to a subprocess Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-01 13:26 +0200
    Re: Pass data to a subprocess andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-01 14:25 +0100
    Re: Pass data to a subprocess Roy Smith <roy@panix.com> - 2012-08-01 15:07 -0400
  Re: Pass data to a subprocess Grant Edwards <invalid@invalid.invalid> - 2012-08-01 14:16 +0000
    Re: Pass data to a subprocess Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-01 16:32 +0200
      Re: Pass data to a subprocess Grant Edwards <invalid@invalid.invalid> - 2012-08-01 19:48 +0000
        Re: Pass data to a subprocess Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-02 08:10 +0200
          Re: Pass data to a subprocess Grant Edwards <invalid@invalid.invalid> - 2012-08-02 14:29 +0000
        Re: Pass data to a subprocess Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-02 13:21 -0400
    Re: Pass data to a subprocess Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-01 16:42 +0200
    Re: Pass data to a subprocess andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-01 16:24 +0100

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