Customized waveform has a impact on CPU ?

[liupingnuaa]

Hello !

I designed a waveform as the picture followed  you see(Listbox is used for displaying peaks ).but I found CPU usage rose up a lot in this way,compared with the situation when the legend and listbox were out of the plotting area.How did these happen?  Now I want this designed waveform,and also like to see normal CPU usage .How can I achieve it ?  

[RavensFan]

I don't think there is a way to do what you want to do with low CPU usage.  The problem is that with the legend box overlapping the graph, it complicates the redraw process of the graph thus consuming more CPU cycles.  Your best bet is to move the listbox off the graph as you've already noticed.