PostgreSQL's SERIAL can keep up with Redis for counters. Before adding caching layers, measure your actual bottlenecks—your intuition is probably wrong.
Hacktoberfest's t-shirt incentive flooded maintainers with low-quality pull requests, turning a well-meaning event into a nightmare of wasted review time.
UUIDs cost slightly more than BIGSERIAL for inserts, but the performance hit is negligible—and they solve real problems like table merging and sharding that…