debug very slow for popular open source project

i've been trying to run this project in web storm

http://keystonejs.com/

and it does run once the mongo db is set up. however, when trying to debug, it takes a very long time to start (over 20 seconds).

This command line /usr/local/bin/node --debug keystone.js seems to run much faster than the standard debug command

/usr/local/bin/node --debug-brk=63371 --nolazy keystone.js

i would like to run from the ide. anyways, i was hoping you could help.