Elton,
I do not really have time right now to strip my app down to a test project to demonstrate the effect.
I can tell you that, when I run my app on my development PC (Win2k, 730 MHz Pentium), I get a baseline CPU usage of < 10% for about 80% of the time with occasional spikes up to ~50% usage. Adding a single slider (updating at 50 Hz) bumps the CPU usage up to about 50% for about 40% of the time. If I get up to 6 sliders, CPU usage pegs out at 100% all the time. Knobs give similar figures. In contrast, if I update a chart with 4 plots and 4 axes and a 5000 sample buffer size at a 50 Hz rate, CPU usage only goes to about 10-20% for about 50% of the time with peaks up to about 40%.
I find it surprising that a single slider or knob seems to pla
ce higher demands on my system than a chart with multiple plots. Is this what you would expect from your own testing at NI?
Wayne