I use bluactive + zen io and tweak animation on developer options to 1x. It helps a bit.
I remember that it was performance profile issue in cozzmy's sources, because AndropaX used his sources but w/o these profiles and RR was very smoothIn 3D performance cases, I have no idea what could cause such framerate drop. Could be Vulkan issue, could be kgsl-power state issue, could be GLES issue or maybe thermal issue. Unfortunately, I have never been able to reproduce that lagginess issue in UI. Everything still is pretty smooth for me. I think that goes more to ROM- specific bug. Try asking your ROM develoer
UPD Idk what happened, but now its smooth
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