I don't know how good it is. I just searched CPAN for your criteria. But things get better when we try them and tell their creators about both good and bad experiences. Or: ignoring modules helps CPAN stagnate.

Edit: Unfortunately this requires more time than many people have to complete their work. I don't have a good solution for that. Over the long term, it might be better to rate jobs higher if they allow enough time for planning and research. And to rate employees higher if they manage their time well enough to achieve these things.

I am just exploring Gungho in order to build the search engine from the scratch .
I have the following questions.

• 1. I don't have any place to look at all the possible options used for Gungho . Can you please suggest me a powerful crawler config file (.yml) so that I can reuse it.
• 2. Is Gungho parse sitemap.xml as well as robots.txt operation ? If not, suggest me how can I do that ?
• 3. Is it crawel multi level ( kind of nested sites ) ?
  Any suggestion on this ?
  

This reads like a "do it for me" type post. Please do some research since this is your task. Basic research will answer your questions.