I was testing an application of ours on Fedora 23 (x86-64) with Qt 4.8.7 and found that the startup is delayed by 40 seconds or more.
The culprit seems to be QPrinter. Just creating a QPrinter object takes anywhere between 25 to 50 seconds! I have attached a minimal example program. I used the a Qt Creator template so it has created a ui file for mainwindow. Do ignore that extra code.
The code in question is in the mainwindow constructor: qDebug() << "Using Qt version: " << qVersion(); qDebug() << "before create printer" << QTime::currentTime(); QPrinter *qp = new QPrinter(QPrinter::ScreenResolution); qDebug() << "after create printer" << QTime::currentTime(); delete qp; qDebug() << "after delete printer" << QTime::currentTime();A typical run gave me about 50 seconds between printing of "before create.." and "after create.." lines. I tried it several times and I got anywhere between 25 to 50 seconds.
I restarted the computer for some other reason, and now everything seems to be alright. The constructor finishes in no time and everything works as expected.
I am wondering if this problem can happen again. What can possibly cause QPrinter constructor to get stuck for such a long time?
Thanks and regards, Syam
qprinter.tar.gz
Description: application/gzip
_______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
