D7255: Remove application directory from QCoreApplication::libraryPaths()

[Fabian Vogt]

fvogt created this revision.
Restricted Application added a project: Plasma.

REVISION SUMMARY
  The directory containing the main application (read through argv[0]) is
  by default added to the list of paths containing libraries.
  This causes various methods to iterate through all entries of the plasmashell
  install location, usually /usr/bin.
  By explicitly removing the path, those unnecessary lookups can be avoided,
  resulting in around 100ms quicker startup on a system with 4000 entries in
  /usr/bin.

TEST PLAN
  Ran plasmashell with and without this fix, no changes except for a slightly
  quicker startup and much less strace noise.

REPOSITORY
  R120 Plasma Workspace

BRANCH
  libfix

REVISION DETAIL
  https://phabricator.kde.org/D7255

AFFECTED FILES
  shell/main.cpp

To: fvogt, #plasma
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart, lukas
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