Regarding FPS and anti-aliasing, FXAA is an attractive choice as it offers a good balance of performance and image quality. It has almost no impact on performance compared to the much more demanding SSAA or MSAA, which can reduce your framerates significantly. On the other hand, the SMAA method takes the middle ground between those two extremes, providing better performance than SSAA or MSAA while avoiding the blurring usually associated with FXAA by only blurring edges. While most gamers and developers look down upon FXAA due to its blurring effects, it's still a useful technique in many cases.