It is a fork with changes:
- Added GUC store_last_plan (false by default) last plan is not saved, only first one, gets +30% increase.
- Does not save queryID in its own format, gives up to +10% increase.
- Added sample_rate (based on random).
- Added slow_statement_duration - this is an unconditional logging of query plans longer than the specified value.
- GUC min_duration - now be specified as time.
- GUC pg_store_plans.track_planning - track planning time.
- make fixes.