diff options
| author | Thiago Macieira <thiago.macieira@intel.com> | 2012-08-13 00:24:27 +0200 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-08-13 09:32:21 +0200 |
| commit | b1fd9a93b957f40670fb386c5c9ca4ea352fd342 (patch) | |
| tree | 393f581cb224a8119ebe7392c0ad3d2f612b68e8 /tests | |
| parent | 4b73950cc83ffdd116b23902e2cd8233d907a224 (diff) | |
Speed up tst_QGraphicsView::mapToScene test
This test is doing a brute-force mapping. Coupled with changes to
QCOMPARE last year, this now allocates and deallocates a lot of memory
per iteration. On my Sandybridge, it takes two minutes to run:
111136.781153 task-clock # 0.999 CPUs utilized
371,692,633,238 cycles # 3.344 GHz
182,641,818,708 stalled-cycles-frontend # 49.14% frontend cycles idle
57,951,552,830 stalled-cycles-backend # 15.59% backend cycles idle
477,216,332,971 instructions # 1.28 insns per cycle
# 0.38 stalled cycles per insn
86,959,637,669 branches # 782.456 M/sec
309,185,237 branch-misses # 0.36% of all branches
111.264868818 seconds time elapsed
Changing the iteration step from 1 to 5 reduces the runtime to about 5
seconds.
Change-Id: I9cad6f85f535f472319da7cd6c4aa28e12ddf1b7
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp b/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp index a27e14bcef..e5a5786748 100644 --- a/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp +++ b/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp @@ -1720,7 +1720,7 @@ void tst_QGraphicsView::mapToScene() #ifdef Q_PROCESSOR_ARM const int step = 20; #else - const int step = 1; + const int step = 5; #endif for (int x = 0; x < view.width(); x += step) { |