> On March 1, 2016, 10:19 a.m., Kai Uwe Broulik wrote: > > src/kicontheme.cpp, line 675 > > <https://git.reviewboard.kde.org/r/127236/diff/1/?file=446153#file446153line675> > > > > This looks like it causes a lot of transient allocations, creating a > > QList just to do a contains() on it. Or is this list kept/cached by QFile?
The list is cached by QDir. See there's a `QStringList QDirPrivate::files` defined in qdir_p.h. - Aleix ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://git.reviewboard.kde.org/r/127236/#review92976 ----------------------------------------------------------- On March 1, 2016, 4:25 a.m., Aleix Pol Gonzalez wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://git.reviewboard.kde.org/r/127236/ > ----------------------------------------------------------- > > (Updated March 1, 2016, 4:25 a.m.) > > > Review request for KDE Frameworks and Christoph Feck. > > > Repository: kiconthemes > > > Description > ------- > > At the moment we're playing Battleship to see if an icon is present in a > subdirectory. This means that we are checking on every directory if there's > an icon that matches the size with a said name on every request. > > This can be seen easily with strace: > ``` > $ strace kwrite |& grep ENOENT | wc -l > 6212 > ``` > After the patch: > ``` > $ strace kwrite |& grep ENOENT | wc -l > 1993 > ``` > We reduce these accesses to let QDir keep the list of files inside the > directory (that was already being generated at some point, it just was being > discarded). > > > Diffs > ----- > > src/kicontheme.cpp 0996054 > > Diff: https://git.reviewboard.kde.org/r/127236/diff/ > > > Testing > ------- > > Builds, tests still pass, applications start noticeably faster. > > > Thanks, > > Aleix Pol Gonzalez > >
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