My performance with the 440 driver (and 390) is approximately half that on Windows 10 with same hardware

Hi,

I have a k200m graphics card in my laptop which dual boots with Windows.
When visiting the page https://webgl2fundamentals.org I get much worse performance on the same hardware on Linux vs Windows.

According to the FPS monitor in Google Chrome it runs at close to 60 FPS on Windows but only 21 FPS on Linux.

Here is a windows capture:

And here is a Linux capture:

The performance difference is the same on firefox. Can anyone help me figure out why?
Here is the output from about:gpu on windows https://gist.github.com/computersarecool/2bae6f262e59cffeb1d5703118c69203
and Linux:
https://gist.github.com/computersarecool/71c0e47fd613d683bfcc7ecf70f18b7c

try to revert to 440.31 .
for me it shows normal on this version