UXA died off when it came to the PutImage XY 500x500 Square test.
A greedy EXA and a UXA acceleration method caused performance drops for another x11perf test.
Switching over to JXRenderMark, which is a newer X Render test, the best performance was with UXA. Using greedy migration heuristics only caused a small performance boost with EXA.
A greedy EXA configuration caused the slowest performance in this JXRenderMark test, while the default EXA configuration was far ahead of UXA and the xf86-video-intel 2.4.1 driver with its EXA implementation.