Looking through the httrack, I see the --fast-engine option. It is listed under
guru options (don't use if possible). Yet it is listed with an asterisk, which
I assume means it is enabled by default. So, a mixed message.

I'm interested in any option that makes httrack run faster. So to clarify... 

Is it enabled by default? How unsafe is it to use - and what kind of errors
would "limited memory boundary checks" lead to plz?
Thank you.

------------------------
From the httrack manpage

Guru options: (do NOT use if possible)
       -#X    *use optimized engine (limited memory boundary checks)
(--fast-engine)