Disabling Filter part when parameter is at zero?

Was wondering if somebody knows a workaround for this (if it's even possible) ...

Let's say you have a group of components in your filter that do a rather CPU-costly operation and the outcome of that filter part is controlled by a slider 0 - 100.
To disable that filter part you could add an additional Switch comp with a checkbox to circumvent it but instead of adding another control to the filter wouldn't it be more elegant if the filter automatically circumvents the CPU-costly filter part if the user sets the slider to 0?

Or use a threshold - you might need to hook up your slider to Assemble RGB first to get connection compatibility to the Source input (for some reason FF requires map source here.. makes no sense though)

Check out this article on optimization with thresholds: Clipping

@Totte: I think using a script for this will be slower than the above, even though you can make the actual script very small and simple. This is because the script component alone is somewhat slow itself (even if the script is as simple as "return 1,1,1,1" and no more). Hopefully we will see performance optimizations for this in the future

Alright, I just compared a script solution with a threshold solution. Even though the threshold solution theoretically involves more calculations, it is way faster. See attached filter.

I hope FF will be able to reduce the baseline overhead of using the script component.

switching test.ffxml

Ok, I guess my old number crusher here show a bigger difference

About your script - you check the slider status for all samples rendered. That is really not necessary:

function prepare()
value = get_slider_input(VALUE)
if (value == 0) then
inp = INPUT1
else
inp = INPUT2
end
end;

function get_sample(x, y)
return get_sample_map(x, y, inp)
end;

(I basically just moved the check to prepare instead of get_sample, see this for more info: Where to put the script parts)

I do not understand anything but seems interesting

Now I went back to this and now understand it more than before, but although this works and you can disable parts of a filter, it will not disable any control attached to the disabled part, so all the controls linked to any of the controls will appear in settings tab, even if it belongs to a disabled part.