• have more than 50 models • have a class with more than a 1000 LOC • have an ActiveRecord model with more than 30 :has_many • can’t run your full test suite on your machine • can’t run your test suite on your machine in under 20 minutes
elements 2,251,799,813,685,150 4 component with 25 elements 134,217,624 5 component with 20 elements 5,242,775 10 component with 10 elements 10,130 * assuming a lot of stuff, including complexity growing according to Reed’s law