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https://reviews.apache.org/r/71827/
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Review request for mesos, Andrei Sekretenko and Greg Mann.


Bugs: MESOS-10026
    https://issues.apache.org/jira/browse/MESOS-10026


Repository: mesos


Description
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This uses the same approach for other GET_ calls in MESOS-10026
of directly serializing from in-memory state, rather than building
up the temporary object and evolving it.

There is currently no benchmark but the improvement should closely
resemble that of the GET_STATE call, for example:

    Before:
    v0 '/state' response took 6.55 secs
    v1 'GetState' application/x-protobuf response took 24.08 secs
    v1 'GetState' application/json response took 22.76 secs

    After:
    v0 '/state' response took 8.00 secs
    v1 'GetState' application/x-protobuf response took 5.73 secs
    v1 'GetState' application/json response took 9.62 secs


Diffs
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  src/master/http.cpp e03655863ea2d4e4464b3d14b359de3d7f059778 
  src/master/master.hpp 93630421d58e6fd26566e81a23cd910957795665 


Diff: https://reviews.apache.org/r/71827/diff/1/


Testing
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make check


Thanks,

Benjamin Mahler

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