Idon’tliketothinkIhavemanyregrets,butit’shardtobelieveanythinggoodcameoutofaparticularlazymomentin2011whenIwaslookingintohowtobestdistrib‐utetoughdiscreteoptimizationproblemsoverclustersofcomputers.MyadvisorexplainedthisnewfangledSparkthinghehadheardof,andIbasicallywroteofft