po 9. 11. 2020 v 14:46 odesílatel Yambu <hyambu@xxxxxxxxx> napsal:
HiMay i know if RAISE INFO impacts performance significantly in a function?Should i comment them out once i'm done using/debugging ?
It depends on more factors - but expressions in RAISE statements are calculated every time and sometimes the result can be filtered. Inside cycles or when functions is evaluated for every row of query, then the overhead can be significant:
postgres=# do $$
begin
for i in 1..100000 loop
raise debug '%', i;
end loop;
end;
$$;
DO
Time: 35,164 ms
postgres=# do $$
begin
begin
for i in 1..100000 loop
raise debug '%', i;
end loop;
end;
$$;
DO
Time: 35,164 ms
postgres=# do $$
begin
-- plpgsql cannot to ignore empty blocks, this loop was evaluated 100K
for i in 1..100000 loop
--raise debug '%', i + 1;
end loop;
end;
$$;
DO
Time: 2,535 ms
--raise debug '%', i + 1;
end loop;
end;
$$;
DO
Time: 2,535 ms
Regards
Pavel
regards
