Instead iterating through all rows to get the number of hidden items,
iterate over the hidden items which are fewer items.
Also don't create a temporary vector with visible flow positions by
remembering the count of hidden items before the working index and
adjusting them appropriately which gives a significant performance
boost when working with a large data set.
[ChangeLog][QtWidgets][QListWidget] Speedup handling of hidden items
when working with large data sets
Task-number: QTBUG-68977
Change-Id: I599b6e97945c245f02229145baad8363ec2bf2f5
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
The two benchmarks graphicslayout and graphicslinearlayout were
disabled for some time. Fixed the compile errors and readded them so
there is at least no bitrotting.
Task-number: QTBUG-27461
Change-Id: Ib0c878e97693c0ad3bf87e658d493da61f5174ee
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
tst_QGraphicsItem::setPos() was provided with test data
but it was not used.
Change-Id: I8ed2a1ef9940024e4a0e666276f0953706869ef7
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
Move all widget-dependent benchmarks which were still in gui
subdirectory to widgets
Task-number: QTBUG-23129
Change-Id: I1359f1ea4036cacdfdbe08ff9ecdf1e2c75a005b
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
This reverts commit 13040043b2.
It introduced a bad regression, noticeable for longer documents, as
it would cause the documentChanged(0, length) to trigger a layout of
the entire document.
The bug report for the commit (or the commit itself) does not contain
a test case, but it is regardless the wrong approach. Note that
QQuickTextEdit already listens to the contentsChange signal and
invalidates the changed parts of the document as a reaction to this,
so it should already work as expected.
[ChangeLog][Qt Gui][Text] Fixed performance hit from showing large
QTextDocuments in a QTextEdit or QTextBrowser. (Regression introduced
in Qt 5.3.0)
Task-number: QTBUG-51411
Change-Id: I6e7fbf8f62a1d68779eef5da3781de14d9fdcad8
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
