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From Dmitry Zhuk <>
Subject Review Request 60003: Reduced copying in defer, dispatch and Future.
Date Mon, 12 Jun 2017 14:53:50 GMT

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Review request for mesos, haosdent huang and Michael Park.

Repository: mesos


Reduced copying in defer, dispatch and Future.

This reduces number of copies made for each parameter in a code like this:
future.then(defer(pid, &SomeProcess::someMethod, param1, param2));

For the objects that do not support move semantics (e.g. protobuf messages), number of copies
is reduced from 8-10 to 6. If move semantics is supported, then number of copies is reduced
from 6-7 to 1 if parameter is passed with std::move, or 2 otherwise.


  3rdparty/libprocess/include/process/defer.hpp 7f3369e723cb244e97930621cbba89cf7873567d 
  3rdparty/libprocess/include/process/deferred.hpp e446621be11ac51f5f91c417cc8975e363c2f715

  3rdparty/libprocess/include/process/dispatch.hpp 3a0793888dc0df5e3ec31b06f47cd920c71e0db9

  3rdparty/libprocess/include/process/future.hpp cce950509f58022e79bb51a6e72ea1a005b9cb50

  3rdparty/libprocess/include/process/http.hpp f637999174d92a98208b5fc49a65f9929efb11a0 



make check

Number of copies was checked by using defer to subscribe process for Future callbacks, and
passing parameters that count number of copies made.


Dmitry Zhuk

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