in reply to
Re: questions concerning using perl to monitor webpages
in thread questions concerning using perl to monitor webpages
Don't use Algorithm::Diff (nor stuff like Text::Diff that uses it) to simply compare for equality.
The person wanted to know which pages had changed, not which lines of each page were unchanged, deleted, added, or modified. Going to the effort to try to find the greatest common sequence of unchanged lines between old and new versions of each page could be a huge waste of resources when all you really want back is a simple Boolean value (per page).