I've been working on DF for the last 6 months and I implemented ~130 commands. It's still missing about 40% of the commands to reach parity with v5/v6.
I will continue working on DF. Primary/Secondary replication is my next milestone.
How apples to apples is the performance comparison given these missing commands?
Those commands wont affect the design of the df, hence they wont affect the performance. Its just work that needs to be done.