I created Gist with logs files, vimrc and and my PATH.
Problem is because it looks like bundler.vim calling ruby to determine the include PATH.
Is there a way to improve that start up time?
Possible releated: #4
Debug Gemfile.lock parsing issues
References #11, #15.
More relevant is #11, though people there were more interested in broken workarounds than actually fixing the issue. See my description of the problem there.
I just pushed up a commit that should reveal the problematic gem if you start with vim -V1.
Closing due to lack of info. There's been lots of improvements in this area so I'd be surprised if it was still an issue.