Question about choice of tornado webserver - realtime kernel

[guysoft]

Hey,
So I am playing with mod-ui on a raspberrypi with a realtime kernel. Its awesome, but sometimes the mod-ui interface just hangs. It might take like 10 minutes to load. I suspect its because of tornado, I didn't really test because I am not sure how to replace it (yet).
I can see images downloading in the speed that is reminiscent of dialup internet (from top to bottom, slowly).

I was wondering if you have an explanation why to use a single thread per process web browser?

[riban-bw]

I am seeing this behaviour on a Raspberry Pi 4. The browser loads the patch but overlays it with a spinning loading animation for about 10 minutes.

I see this message in the log for browsepy:

/usr/local/lib/python3.7/dist-packages/unicategories_tools/cache.py:42: UserWarning: Incompatible unicategories database. Please reinstall unicategories module to regenerate it.

I wonder if this is relevant. I ran pip3 install --force-reinstall unicategories but this did not help.