With a more complex game at high resolution (Xonotic @1080p), the OSS drivers are at 60-65% of performance. This is a really good number. With HiZ and some shader compiler optimisation, it should reach 75%, which is really close to the best that can be reasonably expected from the open stack. At 75% performance, the OSS drivers becomes a real option for everyone
I would have agreed if we were nearing 75% of catalyst in Unigine Heaven.