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Re:AMD Catalyst Linux Driver Performs Differently Based on P... by kllrnohj on Monday July 20, 2015 @10:42AM (#9916355)
If by "a few years back" you mean 14 years ago with the quake/quack thing.

But nobody is saying this is the cheating-style "optimizing" which has been judged as invalid. Both Nvidia and ATI do heavy amounts of game-specific optimizations in drivers and so long as there is no visual difference this is perceived to be fair and valid optimization.

Re:AMD Catalyst Linux Driver Performs Differently Based on P... by smcl on Monday July 20, 2015 @05:46PM (#9919316)
Yep, I posted the quake/quack thing including a link, a date and an "oops my mistake" apologetic comment