why QDesktopServices::openUrl() open a file slowly for the first time

[yogeshgokul]

There is very less you can do. Dfragment ur HDD or just replace it with higher RPM one. Kidding..

Just try to use this:

QDesktopServices::openUrl(QUrl("file:///C:/Documents and Settings/All Users/Desktop", QUrl::StrictMode));

QDesktopServices::openUrl(QUrl("file:///C:/Documents and Settings/All Users/Desktop", QUrl::StrictMode));

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NOTICE QUrl::StrictMode
This should not make significant change but may be. Dont forget, that this will not check for validity of URL. Thats why it can speed up.