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Was any of this confirm by profiling? In standard C++ there is an overloaded 
`operator==` for `std::string` which can compare with a `const char*`.

- Benjamin Bannier


On Jan. 26, 2016, 1:10 a.m., Joris Van Remoortere wrote:
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> (Updated Jan. 26, 2016, 1:10 a.m.)
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> 
> Review request for mesos and Michael Park.
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> Repository: mesos
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> Description
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> This validation is used inside resource math which in turn is used
> heavily in the code base.
> The temporary string allocations caused a significant performance
> degradation in this critical path.
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> Diffs
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>   src/common/roles.cpp 5be807018ff84174cf0cabb933f6828d458d3846 
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> Diff: https://reviews.apache.org/r/42762/diff/
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> Testing
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> make check
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> Thanks,
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> Joris Van Remoortere
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>

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