https://bugs.freedesktop.org/show_bug.cgi?id=110711
--- Comment #2 from Petr Sebor petr@scssoft.com --- Whoops, this one got unnoticed (unreported?) for quite some time it seems. However, the game is still evolving and the rendering code improving over the years. If there is a performance overhead tied together to zeroing VRAM, I'd rather fix the game. I can do that. Please do not add workarounds if that is going to hurt the game performance.