Abnormally Hight Cpu usage on "idle" modules. ( Reaper, standalone(native), Windows 7/10 )

[Ongomato]

Some modules exhibit significant increase in CPU usage after not receiving any input for a short period of time(2-4 seconds). Especially problematic on heavy modules.
This happens in Reaper on all plug-in formats, and in a standalone native build, both on windows 7 and 10.
Doesn't happen in other DAWs ( FL studio, Ableton, Bitwig )

[dromer]

We've seen a couple odd issues with Reaper related to transport.
Do you see a difference in cpu usage when you have transport idle VS running?

[Ongomato]

Just checked, transport doesn't seem to affect this in any way.
I get exactly the same CPU usage as in standalone version.

[falkTX]

This is likely related to denormals.
I hate the idea of messing up with global state from within the plugin, but for this I dont think we have a choice.

@Ongomato do you know how to get the latest github action builds? I can do a test build fix if you are willing to give it a try.

[Ongomato]

Sure, i can test if it works.

[falkTX]

ok pushed a test build in https://github.com/DISTRHO/Cardinal/actions/runs/4127770798
should be ready in ~1h from now.

[Ongomato]

Tried the test build just now and it looks like the fix worked, the issue is gone.
Thank you.

[falkTX]

Thanks for checking!

Will add this as part of the 23.02 release

[falkTX]

This was an old bug we forgot to close, doing that now