Review Request 127765: RFC: Cache global config files

[David Edmundson]

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I think you've spotted a problem, but this patch is treating the symptom not the cause.

According to my logs, the constant loading of kdeglobals comes from:
  - 50x loading .protocol files (which shouldn't be including kdeglobals)
  - 10x loading .directory files (which shouldn't be including kdeglobals)
  - baloofilerc being loaded 8 times. (this is bug in baloo, it should probably include globals but only once)
  - frameworks integration explicitly loading kdeglobals. (this is a bug in frameworks integration)
  - knfsshare

With everything fixed that will be "only" loading it 3 times.

That still means this will have some value, but a much smaller one.

- David Edmundson


On April 27, 2016, 4:14 p.m., Aleix Pol Gonzalez wrote:
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/127765/
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> (Updated April 27, 2016, 4:14 p.m.)
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> 
> Review request for KDE Frameworks and Matthew Dawson.
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> Repository: kconfig
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> Description
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> A next step for my little quest is improving KConfig impact upon start.
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> In callgrind terms, 20% of dolphin's startup time is KConfig and 15% is parsing global files, which is essentially loading kdeglobals 70 times. This of course also means that kdeglobals is scattered 70 times in each application's memory space.
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> To improve such situation, here's an attempt to cache these. I'm not an expert in KConfig, so feedback is really appreciated [[1]](http://i1.kym-cdn.com/photos/images/facebook/000/234/765/b7e.jpg)
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> Diffs
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>   src/core/kconfig.cpp ad52da9 
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> Diff: https://git.reviewboard.kde.org/r/127765/diff/
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> Testing
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> Tests pass, KConfig becomes 6% of dolphin at load.
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> 
> Thanks,
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> Aleix Pol Gonzalez
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>

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