How to disable the preview pixelpipe?

Is there a way to disable the preview pixelpipe? I don’t use preview picture in darkroom, so I hided it in the UI. But the preview pixel pixelpipe is still being processed and consumes CPU/GPU time unnecessarily. Can this be avoided? I didn’t found any way how to do it in preferences, nor in dartablerc file.

I already got the answer. It can’t be disabled unfortunately, because generated data are used at other places like histogram…