Review Request: little faster sycoca

[Jaime Torres Amate]

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http://git.reviewboard.kde.org/r/102723/
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Review request for kdelibs.


Description
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Using this way to build a for loop: for (const_iterator it=list.constBegin, end=list.constEnd ; it != end; ++it)
and replacing the count of bits with the QBitArray method for doing that.
callgrind says:
before: 2984 calls to constBegin, 0,00%. 2960531 calls to constEnd, 2.33%
after: 2921 calls to constBegin, 0,00%. 2921 calls to constEnd, 0.00%

before: calcDiversity, 55.83%  (debug enabled)
after: calcDiversity, 14,46%  (debug enabled)

buildsycoca is still not faster than light, but it is only a four lines patch.


Diffs
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  kdecore/sycoca/ksycocadict.cpp 17ed9ac 

Diff: http://git.reviewboard.kde.org/r/102723/diff/diff


Testing
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Thanks,

Jaime Torres Amate

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