I'm aware, but thanks for posting nevertheless. I've actually read Gentry's thesis. Last I looked into FHE though it was something like 14 times to 100 times as inefficient (either in time or space depending on the scheme) as operating on unencrypted data.

Now things may have changed since then, but I'd imagine it's not yet gotten down to 1.X inefficiency multiplier regardless of the FHE scheme you're using.