There’s not long left to wait for the release of PostgreSQL 12 and — if my own experience is anything to go by — it brings with it a huge amount of new features and general improvements, particularly around performance. The great news is that a lot of the improvements come by default and won’t require you to change anything aside from upgrading your database.

Just Upgrade: How PostgreSQL 12 Can Improve Your Performance
Just upgrade and take advantage of performance improvements in PostgreSQL 12.