review @chancancode @SamSaffron
You’ve signed the CLA, arthurnn. Thank you! This pull request is ready for review.
I need to confirm discourse bench perf does not regress with this upgrade, its a pivotal little piece 
can you run script/bench.rb before and after?
fwiw, 0.8.2 -> 0.8.3 is a pretty small diff, so we can probably deduce that by reading it 
https://github.com/rails-api/active_model_serializers/compare/v0.8.2...v0.8.3
cool then