Slow startup of Qt app

[Ryang HaeDong]

Hi, everyone.

My Qt application is very slow on first startup.
My board is a Allwinner A10 (sun4i linux 3.0.8 + qt everywhere 4.7.1).

When I first try to start my application (with -qws) the screen remains blank for about 4s.

I then briefly get a green background and a mouse pointer before my application starts and hides the mouse.
If I quite my application and start it again, it start instantly (again with brief green screen and mouse pointer).

I tried with Qt static and dynamic, the results do not differ significantly.

I also tried with a simple ‘Hello World’ test and it does the same.

Any ideas why the first start would take so long!

Thanks a lot!

[Bastiaan van den Berg]

Just a guess, did you check if your hostname can be resolved?

Add the hostname to /etc/hosts with ip 127.0.0.1 ..​

This often creates similar delays on many applications, like you described.

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buZz

[Ryang HaeDong]

Thanks for your guess.

As you said I did check the /etc/hosts".

"127.0.0.1      localhost"

[Bastiaan van den Berg]

No, i mean the hostname of your installation.

Check whats in /etc/hostname

Put -that- in /etc/hosts with 127.0.0.1 as ip

​

--

buZz

[Rajesh Mallah]

Dear Ryang ,

in case you are using lots of qml and images in your application ,
compile them into application using the Qt Resource system
http://qt-project.org/doc/qt-5/resources.html you should see a
marked difference in first time startup times. regds mallah.