Lagging window/gui when using realtime table view

Mr Gisa

@Christian-Ehrlicher I made the changes you pointed out and it helped a lot, it's still lagging, but way less than it was before. I can feel the gui freezing when trying to move, and as it's a lot of incoming data per second in the model you can really feel the lag in the gui.
I think you know a software called Wireshark, it was made using Qt and their table receives A LOT (way more than mine) of packets information and it doesn't lag at all, but in my application I can feel the lag when I try to move the window around while the results are being displayed in the table.

Christian Ehrlicher

Another idea is to collect some results and add them once in a second (or every n seconds) instead every single one.

Mr Gisa

I realized something. When I compile in release mode and run the application out of the Qt, like running the actual executable it doesn't lag. Why is that?

Christian Ehrlicher

Because now the compiler don't need to generate debug information and compiles your code with optimizations.

Mr Gisa

You think I should leave that way getting results at real time or do the batched thing? What is the best alternative here?

mrjj

@Mr-Gisa
Since you are planning on even higher payloads, you should test if release mode
can handle that or you simply need to batch them.

Mr Gisa

It will have on average 100 or 200 thousand results.

mrjj

@Mr-Gisa
and are you testing with that many now?

Mr Gisa

5~10 thousands, I can't get to 100~200 cause I have to code the other APIs, but with that it's working normally at this point.

mrjj

@Mr-Gisa
Ok, but you can postpone it until you have test data then and work on the other parts.

Mr Gisa

Exactly, that is what I'm going to do. Thank you all for your help. If anything happen in the future I'll say it here.
I'm also going to get a copy with a friend of mine of his Intel Parallel Studio 2018 to check a few things in the application, I hope it works with Qt.

mrjj

@Mr-Gisa said in Lagging window/gui when using realtime table view:

Intel Parallel Studio 2018

Well its a compiler so good chance it can compile Qt.

Mr Gisa

I'm not going to use the compiler, but the Intel® Inspector and Intel® VTune™ Amplifier.

Intel® Inspector: Memory and Thread Debugger
Intel® VTune™ Amplifier: Performance Profiler

mrjj

@Mr-Gisa
Ok, but can it do it without touching the source code?

Mr Gisa

Yes, but you can also specify the source code and it will show you the places that it has leaks and is slow, stuff like that.

mrjj

@Mr-Gisa
Sounds really good. Never tested it.

Mr Gisa

I recommend it, I'm not a pro using it but I could detect a lot of things in my code that helped me improve. Not in this one I mean, in other projects.I'm going to test using this one right now