strongly agree on profiler and SQL. Horror story re SQL: in my SaaS I skipped sql and went with cloud datastore (NoSql) and regret it. basically (to simplify

strongly agree on profiler and SQL. Horror story re SQL: in my SaaS I skipped sql and went with cloud datastore (NoSql) and regret it. basically (to simplify) you can't query your data without doing a full table scan (IE Slow).