Heroes and Juniors — But at different points of an organization’s life cycle hiring more senior people does not increase velocity it actually diminishes it. The senior people create more things than the organization can maintain or support. People work longer and longer hours, spend more time on-call, have to maintain expertise in more and more different parts of an architecture that is getting more and more complex. They burn out and the organization loses institutional knowledge.
pg_flame — visualise Postgres queries as flame graphs.