CPU rise sharply when open my main VI

[Xinghe.W]

Hi, this may be a silly question. I am developing a GUI recently, and I obeserved that when I open my main VI (not running), the CPU usage rises sharply over 40%. I'm using Labview 2015. Does anyone have any idea how does this happen?

PS: The CPU drops as soon as I minimize the FP window of my VI. How strange it is!

[Gregory]

Do you have some interesting custom controls? Can you attach your front panel so we can see if we have a similar issue?

[altenbach]

Do you have a lot of overlapping controls? Any XControls? Anything else unusual?

[Xinghe.W]

Yes I made a lot of layers of customized decorations and controls. But since the VI is not running, how can I eat up half my CPU by just showing it's front panel?

I can't post the source code as it belongs to my company. 

[Xinghe.W]

Yes, I do have a lot of overlapping graphs.

[Gregory · Accepted solution]

Try copying everything into a new VI, then delete the controls one-by-one to see if you can find the main offender.

[Xinghe.W · Accepted solution]

Thank you for your suggestion. I found one of transparent button is the main course of the CPU rising. The OFF condition of that button is transparent with a red outline. What I need is a button with transparent OFF condition without the red outline, so I set it to be transparent by the tool pallette without a second thought. It turns out to be a very bad idea. Setting a transparent graph to be transparent in Labview is not good.

[billko]

I learned something new.  i didn't know that controls could eat up CPU cycles even when a VI isn't running!

[Xinghe.W]

And that burden will be carrying on when you run that VI. Feels great to solve this! 🙂

[billko]

🙂