The bson gem's .gemfile has a wildcard include for jars, which ends up including a vendored jruby jar, making the bson gem about 8MB's larger than it needs to be: https://github.com/mongodb/mongo-ruby-driver/blob/master/bson.gemspec#L17

Also, it would be awesome if there were platform specific gems, so that the jruby dependencies would not need to be included for the "ruby" platform's gem.

thanks.