transparent-panels@germanfr: Cinnamon becoming laggy if multi-monitor panels are all transparent

[alefa03]

Extension version/Build date

4.0~20220727

Cinnamon version

5.8.4

Distribution

Mint 21.2 Cinnamon

Graphics hardware and driver used

NVIDIA GeForce 1660 Super - Latest NVIDIA Drivers

Extension name and maintainer

transparent-panels@germanfr @germanfr

What happened?

Greetings. I will get right to the point.
I am currently using Linux Mint 21.2 Cinnamon with two monitors. I set a bottom panel for each of these monitors. If BOTH these panels are transparent (no maximized windows) Cinnamon becomes very laggy in its entirety (window drags, menu panel show/hide, etc.).
This problem does not happen if just one of the two panels is transparent.

I hope this could get fixed soon. I tried to look at the source code, but unfortunately I couldn't find what is causing the problem.

@germanfr

Other information

I even noticed that the problem temporarily fixes itself if I edit the panels in the Mint settings while the extension is activated (e.g. by adding and removing a top panel). But then, after restarting Cinnamon, or after doing any other action which makes the panels' transparency status to refresh, the same issue appears.

[BTBlades]

Same problem, 3 monitors.

Extension version/Build date

4.0~20220727
Cinnamon version

6.0.4
Distribution

Mint 21.3 Cinnamon
Graphics hardware and driver used

NVIDIA GeForce RTX 3060 - Latest NVIDIA Drivers