As several people have told me, there’s benchmarks of DragonFly 3.0 vs. 2.10, available on Phoronix.   CPU performance shows a significant improvement, in tests that actually test it.   (I’d think a file compression test would be disk-limited, for instance.)   Disk performance isn’t as great, but that may be in part because Hammer no longer will starve reading to benefit writing; that makes benchmarks look worse but improves real-world interactivity.  I’m sure there’s more quibbling to do, since it’s lies, damn lies benchmarks.