Slow on Firefox / Linux / RX 550

[metiulekm]

With the mentioned configuration, I unfortunately get less than 1 FPS on the bunnymark even with 1 bunny only.

Some details:

• This happens only on Firefox (131.0, but this also happened on the older versions), I do not get this issue on Chromium.
• I use Plasma on Arch on this PC. I can reproduce this both on X11 and Wayland.
• I can reproduce this with the version from the README, but also when I build the bunnymark myself, both against v0.12.1 and develop versions of Notan.
• My GPU, as mentioned, is RX 550.
• Native version works fine.
• I do not remember having a similar issue with any other browser game framework. Notably the kiss3d example also runs smoothly, even though, if I understand correctly, it also uses GL via glow.

Not really sure how to begin debugging this :) I tried to run some quick profiling and it seems that most of the time is spend inside buffer_data_u8_slice, called here, with a flame graph like this (on release version):