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From Guangya Liu <gyliu...@gmail.com>
Subject Review Request 50557: Used `add` instead of `+=` for `Resources::filter`.
Date Thu, 28 Jul 2016 08:53:17 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/50557/
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Review request for mesos, Benjamin Mahler, Joris Van Remoortere, and Klaus Ma.


Bugs: MESOS-5919
    https://issues.apache.org/jira/browse/MESOS-5919


Repository: mesos


Description
-------

The current logic of `Resources::filter` is using `+=` to add
the filtered resource object and the `+=` resource object will
invoke `validate` which is not necessary as all of the resource
objects are valid.

The fix is using `add` instead of `+=` for `Resources::filter`
, this can make sure there is no validation and can improve
performance of `Resources::filter` for resources object.


Diffs
-----

  src/common/resources.cpp 3dbff24d6859d3b1ed8589cec50170a5202cfbcb 
  src/v1/resources.cpp 3c85dc8aa8125962b44e60806ece83a7653d0dc7 

Diff: https://reviews.apache.org/r/50557/diff/


Testing
-------

make
make check

The performance for `ports` resources of `r.nonRevocable()` was improved about `8s` with 5000
operations.

Before fix with validation.
```
[ RUN      ] ResourcesOperators/Resources_BENCHMARK_Test.Arithmetic/2
Took 2.832429secs to perform 1000 'total += r' operations on ports(*):[1-2, 4-5, 7-8, 10-11,
13-14, 16-17, 1...
Took 22.034252secs to perform 1000 'total.contains(r)' operations on ports(*):[1-2, 4-5, 7-8,
10-11, 13-14, 16-17, 1...
Took 3.628885secs to perform 1000 'total -= r' operations on ports(*):[1-2, 4-5, 7-8, 10-11,
13-14, 16-17, 1...
Took 3.113548secs to perform 1000 'total = total + r' operations on ports(*):[1-2, 4-5, 7-8,
10-11, 13-14, 16-17, 1...
Took 3.854608secs to perform 1000 'total = total - r' operations on ports(*):[1-2, 4-5, 7-8,
10-11, 13-14, 16-17, 1...
Took 8.517941secs to perform 1000 'r.nonRevocable()' operations on ports(*):[1-2, 4-5, 7-8,
10-11, 13-14, 16-17, 1...
[       OK ] ResourcesOperators/Resources_BENCHMARK_Test.Arithmetic/2 (43985 ms)
```

After fix without validation.
```
[ RUN      ] ResourcesOperators/Resources_BENCHMARK_Test.Arithmetic/2
Took 2.834335secs to perform 1000 'total += r' operations on ports(*):[1-2, 4-5, 7-8, 10-11,
13-14, 16-17, 1...
Took 21.828846secs to perform 1000 'total.contains(r)' operations on ports(*):[1-2, 4-5, 7-8,
10-11, 13-14, 16-17, 1...
Took 3.689858secs to perform 1000 'total -= r' operations on ports(*):[1-2, 4-5, 7-8, 10-11,
13-14, 16-17, 1...
Took 2.962259secs to perform 1000 'total = total + r' operations on ports(*):[1-2, 4-5, 7-8,
10-11, 13-14, 16-17, 1...
Took 3.760281secs to perform 1000 'total = total - r' operations on ports(*):[1-2, 4-5, 7-8,
10-11, 13-14, 16-17, 1...
Took 125159us to perform 1000 'r.nonRevocable()' operations on ports(*):[1-2, 4-5, 7-8, 10-11,
13-14, 16-17, 1...
[       OK ] ResourcesOperators/Resources_BENCHMARK_Test.Arithmetic/2 (35204 ms)
```


Thanks,

Guangya Liu


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