https://bugs.freedesktop.org/show_bug.cgi?id=89203
--- Comment #8 from andre35822@yahoo.com --- (In reply to smoki from comment #7)
The best is if you can bisect mesa, if 10.3 worked fine it should be easy :) Or try various settings in game, might be only one which trigger slow case. Or if someone other want to reproduce it, apitrace trace will be usefull, etc...
Otherwise more info is needed, like:
Which version of Minecraft? Java or openjdk used? Did you use optifine?
You might post your options.txt file, because as i said it might only happen with exact settings and also optionsof.txt in case you use optifine, etc...
Bisect mesa? I found this in the arch linux wiki https://wiki.archlinux.org/index.php/Bisecting_Mesa so what is it really? Its to notify the mesa developers from git? I am not sure lol sorry. I am going to do some more testing, with Mesa 10.3 and Mesa 10.4 and different versions of Minecraft. I am very new to the whole reporting bugs on linux and don't know of these beautiful programs that exist.