zink: supertux very slow (~3fps) on default OpenGL 3 renderer
Supertux ( https://www.supertux.org/ ) 0.6.2 game is very slow with zink on intel (with default --renderer opengl which is OpenGL 3), either with mesa git:
GL_RENDERER = zink (Intel(R) HD Graphics 620 (KBL GT2))
GL_VERSION = 3.0 Mesa 21.0.0-devel (git-448e603 2020-12-21 groovy-oibaf-ppa)
or zink-wip (at 857b9253):
When running with non-default --renderer opengl20 it runs a lot faster.