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https://issues.apache.org/jira/browse/MESOS-6972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16279122#comment-16279122
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Michael Park commented on MESOS-6972:
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commit 6839897c5464fce6b8cbd253d959a7e2efd72987 (HEAD -> master,
upstream/master)
Author: Dmitry Zhuk <dz...@twopensource.com>
Date: Tue Dec 5 11:21:27 2017 -0800
Made `Event` move-only in libprocess.
Review: https://reviews.apache.org/r/64347/
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commit c9e6a03c02e9f8dc040b937ccd5ae89e5530fd7e
Author: Dmitry Zhuk <dz...@twopensource.com>
Date: Tue Dec 5 11:21:11 2017 -0800
Used `std::move` for `Event`s consumption in the master.
Review: https://reviews.apache.org/r/63641/
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commit 8014e3f9e1838745a6f3af7c1e2a557bd74349b0
Author: Dmitry Zhuk <dz...@twopensource.com>
Date: Tue Dec 5 11:20:55 2017 -0800
Added `CallableOnce` support in `Future`.
`Future` guarantees that callbacks are called at most once, so it can
use `lambda::CallableOnce` to expicitly declare this, and allow
corresponding optimizations with moves.
Review: https://reviews.apache.org/r/63638/
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commit 09b72e9bbf87793ce84df5d5f9d5f292c60fa5ee
Author: Dmitry Zhuk <dz...@twopensource.com>
Date: Tue Dec 5 11:20:41 2017 -0800
Added `CallableOnce` support in `defer`.
This allows `defer` result to be converted to `CallableOnce`, ensuring
that bound arguments are moved, when call is made, and avoiding making
copies of bound arguments.
Review: https://reviews.apache.org/r/63637/
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> Improve performance of protobuf message passing by removing RepeatedPtrField
> to vector conversion.
> --------------------------------------------------------------------------------------------------
>
> Key: MESOS-6972
> URL: https://issues.apache.org/jira/browse/MESOS-6972
> Project: Mesos
> Issue Type: Improvement
> Reporter: Benjamin Mahler
> Labels: performance, tech-debt
>
> Currently, all protobuf message handlers must take a {{vector}} for repeated
> fields, rather than a {{RepeatedPtrField}}.
> This requires that a copy be performed of the repeated field's entries (see
> [here|https://github.com/apache/mesos/blob/9228ebc239dac42825390bebc72053dbf3ae7b09/3rdparty/libprocess/include/process/protobuf.hpp#L78-L87]),
> which can be very expensive in some cases. We should avoid requiring this
> expense on the callers.
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