Our API backend service relies heavily on ActiveModel::Serializer for building response objects. We are using version 0.8 which hasn’t been updated for many years. As part of the effort of upgrading our service to Rails 5 (and eventually Rails 6), we start to seek ways to upgrade active_model_serializers. ActiveModel::Serializers From 0.8 to 0.10 The first candidate is the latest 0.10 of active_model_serializers. On one hand, our benchmark shows some really good performance improvement. In ...