Idea: load spec/support files on replay for global shared examples

[mnmandahalf]

Thank you for creating such a fantastic gem.

I noticed that RSpec.configuration doesn't retain global shared examples because they are private members, and as such, they're not accessible.
To resolve this, I attempted to add the following code to re-register global shared examples in Rspec.world, which seemed to work well:

$LOAD_PATH << "./spec/support"
Dir["./spec/support/**/*.rb"].sort.each { |f| load f }

However, this piece of code seems to slow down the spec execution as it loads all files.
Do you think this approach is a good trade-off for the utility it provides?