WWW-Mechanize 1.16

on Perl CPAN

• Sped up Mech significantly (~20% in some cases). Images and
  links are extracted from the HTML, and objects are created,
  only when they're actually needed. This will be a speedup for
  pages where you're only following links, or vice versa.
  

[THINGS THAT MAY BREAK YOUR CODE]

• If you've been relying on the $mech->{images} and $mech->{links}
  fields being populated so that you can bypass the $mech->images()
  and $mech->links() accessors, your code will break. That's OK,
  because you should have been using the accessors all along.