Wow, there's some hostility there. Yes. I haven't interacted with the bundler team but I did try to contribute to rubygems during their security debacle. I hop

Wow, there's some hostility there. Yes. I haven't interacted with the bundler team but I did try to contribute to rubygems during their security debacle. I hope these are not the same people. but I've yet to come up with a solution that properly replicates Ruby's search-and-load behavior, and invariably ends up breaking on some edge case. I have a hard time believing that'd be your only bottleneck? If that's really all then do exactly what you said. Break the edge case, replace your iterative search with the O(1) lookup. There you have your --fast flag. Document that require_relative is to be used for relative imports for the flag to work. Then count the days until someone patches up a 'fast-rails'. And to the gem that auto-converts projects into --fast compatibility.