> I've been trying to make a local 122gb mirror for a
> week now, but annoying speed limitations in both
> 3.33 and 3.48 drive me crazy.

--disable-security-limits
--max-rate=0

will unlock the rate limiter. You can also bypass connection limits and socket
limits after that.

--sockets=16 --connection-per-second=0

(.. but beware not to use it on a live server)

> The program is really not optimized for local
> environment it seems, is that intentional?
It is by default optimized NOT to clobber remote servers, and therefore not
suitable by default for localhost, or network stress test.