diff options
| author | Milian Wolff <milian.wolff@kdab.com> | 2016-03-31 19:43:27 +0200 |
|---|---|---|
| committer | Milian Wolff <milian.wolff@kdab.com> | 2016-07-18 08:53:51 +0000 |
| commit | 9d4b55640788bf96ea100ad0616fd4236370d140 (patch) | |
| tree | 3fa1cc35f6e2c334cb80d7ccf297fd64ce0c4700 /tests/benchmarks/qml/qqmlchangeset/qqmlchangeset.pro | |
| parent | b08a4c2f421494b515dc7ef6f50d33e37e18eb91 (diff) | |
Add benchmark for pathological O(N^2) behavior in QQmlChangeSet.
This patch is just here for documentation of this behavior and does not
come with a fix yet. This hotspot was found while profiling the example
code attached to QTBUG-34391. It is triggered by the repeated calls
to _q_itemsMoved in QQmlDelegateModel::_q_layoutChanged.
Change-Id: I758744b3650c3c47dc86b914b823c3e9f96ce81e
Reviewed-by: Albert Astals Cid <albert.astals@canonical.com>
Reviewed-by: Daniel Vrátil <daniel.vratil@kdab.com>
Reviewed-by: Christopher Adams <chris.adams@jollamobile.com>
Diffstat (limited to 'tests/benchmarks/qml/qqmlchangeset/qqmlchangeset.pro')
| -rw-r--r-- | tests/benchmarks/qml/qqmlchangeset/qqmlchangeset.pro | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tests/benchmarks/qml/qqmlchangeset/qqmlchangeset.pro b/tests/benchmarks/qml/qqmlchangeset/qqmlchangeset.pro new file mode 100644 index 0000000000..fc0ccdf8ed --- /dev/null +++ b/tests/benchmarks/qml/qqmlchangeset/qqmlchangeset.pro @@ -0,0 +1,10 @@ +CONFIG += benchmark +TEMPLATE = app +TARGET = tst_qqmlchangeset +QT += qml quick-private testlib +osx:CONFIG -= app_bundle + +SOURCES += tst_qqmlchangeset.cpp + +DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0 + |