D7916: Introduce MimeTypeChecker::hasWantedMimeTypes

[Milian Wolff]

mwolff created this revision.
Restricted Application added a project: KDE PIM.
Restricted Application added a subscriber: KDE PIM.

REVISION SUMMARY
  This allows us to skip the slow MimeTypeChecker::wantedMimeTypes
  call, which allocates a QStringList on every call. This removes
  ~200k temporary allocations that I see in one heaptrack file for
  kmail.

REPOSITORY
  R165 Akonadi

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D7916

AFFECTED FILES
  autotests/libs/mimetypecheckertest.cpp
  src/core/mimetypechecker.cpp
  src/core/mimetypechecker.h
  src/core/models/entitytreemodel_p.cpp

To: mwolff
Cc: #kde_pim, dvasin, winterz, vkrause, mlaurent, knauss, dvratil
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