Review Request 127380: More conservative approach to saving some disk accesses
Mark Gaiser
markg85 at gmail.com
Tue Mar 15 09:44:43 UTC 2016
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https://git.reviewboard.kde.org/r/127380/#review93538
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Why don't you just make use of the posix stat call? I know the QFileInfo::lastModified() has some issues as David described in your last approach, but why not use the plain simple stat function?
http://man7.org/linux/man-pages/man2/stat.2.html
st_mtim specifically, which is described as:
The field st_mtime is changed by file modifications, for example, by
mknod(2), truncate(2), utime(2), and write(2) (of more than zero
bytes). Moreover, st_mtime of a directory is changed by the creation
or deletion of files in that directory. The st_mtime field is not
changed for changes in owner, group, hard link count, or mode.
Which is exactly what you want, should still be working in a cross platform manner and gives you the optimizations you initially had without the issue you had, right?
Just my 2 cents :)
- Mark Gaiser
On mrt 15, 2016, 1:52 a.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/127380/
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> (Updated mrt 15, 2016, 1:52 a.m.)
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> Review request for KDE Frameworks and Christoph Feck.
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> Repository: kiconthemes
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> Description
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> My previous approach to KIconThemes felt like a dead end, I decided I'll take a more conservative approach. Here's a first step.
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> Diffs
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> autotests/CMakeLists.txt 61e81f6
> autotests/kiconloader_benchmark.cpp PRE-CREATION
> src/kiconloader.cpp 75ab482
> src/kicontheme.cpp 0996054
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> Diff: https://git.reviewboard.kde.org/r/127380/diff/
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> Testing
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> Attempts to call `KIconThemeDir::iconPath` on the benchmark: 4318 after/5040 before= 17% less QFile::exists
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> Thanks,
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> Aleix Pol Gonzalez
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>
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