RE: minimizing pg_stat_statements performance overhead

my test case:

drop table a;
create table a ();

DO
$$
DECLARE
i int;
BEGIN
for i in 1..20
loop
execute 'alter table a add column a'||i::text||' int';
end loop;
END
$$;

select  pg_stat_statements_reset();
set pg_stat_statements.track='none';

DO
$$
DECLARE
i int;
j int;
BEGIN
for j in 1..20
loop
for i in 1..20
loop
execute 'select a'||i::text||',a'||j::text||' from a where 1=2';
end loop;
end loop;
END
$$;




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