Today I had an interesting report from Web::Scraper user, saying that he has a script that runs really quick (less than 1 sec) on Macbook but so slow (50 secs) on AMD dual CPU machine. Here's the dprof report: Total Elapsed Time = 47.32165 Seconds User+System Time = 31.07165 Seconds Exclusive Times %Time ExclSec CumulS #Calls sec/call Csec/c Name 51.6 16.03 16.033 6922 0.0023 0.0023 XML::XPathEn