> In addition to security limits disabling, you may
> try:
> -%N0 --max-rate=0 --connection-per-second=0
> --advanced-maxlinks=0
> 
> But httrack has a monothreaded html parser, so
> you'll be probably limited by it somehow.


I already had those as:
-%N0 --max-rate=50000000 --connection-per-second=500
--advanced-maxlinks=10000000

I tried changing the values to 0 but not much changed in the performance.