Review Request: VCS: Speedup the check for non-existant git-repositories

[David Nolden]

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We should do these checks whenever possible with a VCS system. We should even do it if it doesn't bring a speedup(Although it most certainly will), because if we call for example the "git" executable, it has to be loaded including all its dependent libraries, which can be really slow on a cold cache, and pollutes the cache with content we just don't need if the vcs is not used.

- David


On 2009-04-06 11:08:09, Fabian Wiesel wrote:
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> (Updated 2009-04-06 11:08:09)
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> Review request for KDevelop.
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> Summary
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> In the case that a directory is not under the control of git, a check whether a directory is under version control accounts roughly 40ms of a total 70ms (Peak ~200ms) in the creation of a context menu.
> By first checking for the existence of a .git directory in all parent directories, one avoids the call to an external program.  Should a correctly named directory be found, the external program is still called, which does a more sophisticated check.
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> In my limited "benchmark", the additional calling costs seem to be up to 1ms.
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> Diffs
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>   /trunk/KDE/kdevplatform/plugins/git/gitplugin.cpp 950241 
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> Diff: http://reviewboard.kde.org/r/532/diff
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> Testing
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> Thanks,
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> Fabian
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