Review Request 127215: simplify code, reduce pointer dereferences

[Nick Shaforostoff]

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https://git.reviewboard.kde.org/r/127215/
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Review request for KDE Frameworks.


Repository: kservice


Description
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Changes are mostly related to containers/iterators, but there are also few QString related optimizations

note that i have made a switch from QLinkedList to just QList because it performs better for T=<void*>
also i have changed QStringList to QSet<QString> in one place to make the code run faster


Diffs
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  src/sycoca/kbuildmimetypefactory.cpp 340f76a 
  src/sycoca/kbuildservicefactory.cpp a74f2e8 
  src/sycoca/kbuildsycoca.cpp e99e906 
  src/sycoca/kmimeassociations.cpp 9423b27 
  src/sycoca/ksycocadict.cpp f33d01a 
  src/sycoca/ksycocafactory.cpp e410581 

Diff: https://git.reviewboard.kde.org/r/127215/diff/


Testing
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all tests pass, except kmimeassociationstest (fakeApplicationService is NULL), but it fails also without my changes


Thanks,

Nick Shaforostoff

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