Earlier quoted context omitted.
Idk why phosh is so slow on the pinephone. Just about any other (x11 anyway) DE was fast on it even before the updated drivers a few months ago. I think the other issue though is that on the nokia GTK was still built with software rendering in mind whereas modern graphics toolkits tend to do the "everything has OpenGL and stuff without it can use LLVMPIPE" thing which results in very poor performance on incompatible…
Something I also want to investigate -- CPU is at 100% on 1 core for 5~ seconds when launching anything. Not even waiting for IO, it's mostly user time
https://www.phoronix.com/scan.php?page=news_item&px=Mesa-Lim...