GUI application problems

[jdiewald]

One of the things that you learn when you study performance analysis is that you can't be sure about where your program is slowing down until you actually measure it. There are a number of things that could be causing problems in this environment - and there are several good suggestions here. However, to be absolutely sure, you should find a performance analysis tool that runs on your system and measure what your program is actually doing. There may be several contributing factors that people could continue to guess about. Be sure. Measure.

[Mek82]

I've understood that the problem is the custom widget with SVG graphics... if I remove the custom widget the GUI application starts immidiatly.
If I put more graphics in the resource system the GUI application starts after more seconds.
In this way I've understood that the problem is in the loading of the SVG graphics.
Are 22 different graphics each one from 10 to 150kB and the total 22 graphics are 1.4 MB.
I don't know tool to check and monitor the performance if you could advise one I will be very happy...

Thanks

[jdiewald]

There are different tools depending on your platform. Most recently, I've used VTune (Intel) on Windows. In a previous job, I used (and helped develop) the DevPartner Studio performance tools (was NuMega, then Compuware, now Microfocus) on Windows. At my current job, they use Shark on the Macintosh. There are many other tools out there. A quick Google search of "performance analysis c++" turns up quite a few hits.

[tbscope]

Even if you don't have external tools, justs a fex QTime differences and debug lines give a rough estimate.

But, expect to have a larger loading time when you load and render svg files at startup. Unless you could load them later when the program is already running, you have to accept the load time. 3 seconds isn't that long anyway.