Very slow processing of DSP on sample

The rendering of sample DSP into waveform is really slow. Track DSP as well.
Takes few seconds for short sample (168 values). Which slows down whole workflow.
Linux with Ryzen 5700G. No VSTs used, only native FX like distortion.

The problem with most recent version (3.4.3), checked 3.4.1 as well - same problem.

I don’t think this is by design, as these sampler FX are played in realtime.
Can you please fix it?