Slow work in Qt Creator

UndeadBlow

Hi guys. I'm in strange situation, when I'm execute this trivial test code in Qt Creator (using non static release build Qt 4.8):
@#include <QCoreApplication>
#include <QtCore>
#include <QDebug>
#include <QTime>

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

int times = 3;
int len = 500;
int kmer = 9;

QFile file&#40;"D:\\one.txt"&#41;;
file.open(QIODevice::ReadOnly&#41;;

QString strand = file.readLine(&#41;;
strand.remove("\n"&#41;;

QSet<QString> answersKmers;
QString nextKmer;
qDebug(&#41; << "Start";
QTime timer;
timer.start();
for(int i = 0; i < strand.size() - kmer + 1; ++i)
{
    nextKmer = strand.mid(i ,  kmer);

    if(!answersKmers.contains(nextKmer))
    {
        if(strand.mid(i,  len).count(nextKmer) >= times)
            answersKmers.insert(nextKmer);
    }
}
qDebug() << QString("End in %1 seconds").arg(timer.elapsed() / 1000);

qDebug() << "9-mers form (500,3)-clumps in the E. coli genome: " << answersKmers.size();

return a.exec(&#41;;

}
@
it's works many minutes, but if execute .exe file of this program from explorer, it will works 4 seconds. I can't understand why! At my friend PC its works good even in Creator. What's the problem it can be?

P.S. On my netbook with Debian it works in Creator fine too.

SGaist

Hi,

When running from explorer did you first follow the "windows development guide":http://qt-project.org/doc/qt-4.8/deployment-windows.html ?

UndeadBlow

[quote author="SGaist" date="1382817656"]Hi,

When running from explorer did you first follow the "windows development guide":http://qt-project.org/doc/qt-4.8/deployment-windows.html ?[/quote]
When running from explorer, I'm just double click and all fine :)
In Creator if running from F5 (debugger) it will be so slow (minutes instead of seconds), but if push CTRL+R (just run) everything will be ok. This I have described release mode. I can't understand what with debagger - on netbook with Debian all ok from F5.

SGaist

It can depend on several things, the debugger you are using, the number of libraries you are using etc...