When downloading a site, httrack tests a lot of links.
when testing links the number of active connections is 
1, the transfer rate about 250 B/sec.
When httrack downloads files, the number of active 
connections ist 8 (default) and the transfer rate ist 
about 80KB/sec.
Why doesn't httrack download files and test links 
simultanously? In the pipe are files to download 
(status ready) but httrack starts the download after 
testing all links!