I did some research and found some interesting module like what Mr. Sinistral gave me the LWP::Parallel. I also managed to stumble on some of the threads here in Perlmonks that discussed about my concern. I'll just continue reading this stuff and try to figure out how am I going to lessen the memory usage, because when ever I tried to spawn 100 requests, it surely goes way way up high, 1Gig of memory usage.

I'm also thinking of using httperf, well anyway, thanks for your help guys...

and by the way, 1Gig of memory usage on 100 requests, expected or not?