Sure about it, and yes I will post an issue in Jira. The good news is also that in Release mode, I see no difference of speed at all with 4.8.3.
I will make tests on Mac too. Philippe On Mon, 15 Apr 2013 13:33:17 +0200 William Hallatt <goblincod...@gmail.com> wrote: If you're sure about it, please log a bug explaining what you've done :) > > > > On 15 April 2013 10:34, Philippe <philw...@gmail.com> wrote: > I think I have found the problem: the qaccessible interface... >> >> While my program was kind of hanging during those long seconds, I have >> broken several times in the debugger, and saw that some accessibility >> code was being executed. Then I did this quick Qt change: >> in qaccessible.cpp >> QAccessible::queryAccessibleInterface(...) >> I insert "return 0;" at the start... >> et voilà, back to normal speed! (actually, a 20% reduction compared to >> 4.8, but this is the day and night compared to before). >> This code change is a dirty hack of course, but it simply make Qt 5 usable >> again for me... >> >> There is definitly something wrong on the Windows accessibility code... >> >> Philippe >> >> On Mon, 15 Apr 2013 07:45:55 +0200 >> "Michael Klank" <michael.kl...@amk-antriebe.de> wrote: >> >> > We have a similar problem here. I did compare a small (bigxml) program from >> > http://qt-project.org/ which reads an xml file in a QTreeWidget and >> > expands all >> > nodes. The test xml file is 2MB. Qt5.0.2 MSVC2012 64Bit/32Bit is up to 20x >> > slower than Qt4.8.0 MSVC2010 32Bit, in release mode!!! That's strange. And >> > I >> > didn't say anything from debug mode! >> > >> > >> > -----Ursprüngliche Nachricht----- >> > Von: interest-bounces+michael.klank=amk-antriebe...@qt-project.org >> > [mailto:<mailto:interest-bounces%2Bmichael.klank>interest-bounces+michael.klank=amk-antriebe...@qt-project.org] >> > Im >> > Auftrag von ???? ?????????? >> > Gesendet: Sonntag, 14. April 2013 20:14 >> > An: Philippe >> > Cc: interest@qt-project.org >> > Betreff: Re: [Interest] Qt 5.0.2 speed and widgets >> > >> > Yes, we are having same problem here. Same setup, AFAIK. >> > >> > Don't know what's causing problem. >> > >> > Also, Mac OS has no noticeable speed regressions, it seems Windows-specific >> > issue. >> > >> >> > ???? ?????????? >> > >> > 14.04.2013, ? 21:55, Philippe <philw...@gmail.com> ???????(?): >> > >> > > Compared to Qt 4.8.x, I experiment a very sensible reduction of speed >> > > in 5.0.2 when widgets are created or complex windows activated. >> > > In Release mode this is "sort of acceptable",... maybe half speed. >> > > But in debug mode, this is dramatically slower, up to 6x slower than >> > > in 4.8.3. >> > > >> > > This is not a painting issue as the speed inside a window has been >> > > measured to be sensibly the same to 4.8.x (using ANGLE). >> > > >> > > Anyone else sees the same? Any known reason for this? >> > > >> > > Setup: Windows 7, Visual 2010, Qt 32 bit, *very* fast computer. >> > > >> > > Philippe >> > > >> > _______________________________________________ >> > Interest mailing list >> > Interest@qt-project.org >> > http://lists.qt-project.org/mailman/listinfo/interest >> >> >> _______________________________________________ >> Interest mailing list >> Interest@qt-project.org >> http://lists.qt-project.org/mailman/listinfo/interest >> >>
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