Hey Martin, Thanks for running these and pointing this out. I've replicated the results with tcrypt and fixed some issues, and the next patch series should be a lot closer to what you'd expect, instead of the regression you noticed. Most of the slowdown happened as a result of over-eager XSAVEs, which I've now rectified. I'm still working on a few other facets of it, but I believe v5 will be more satisfactory when posted. Regards, Jason