drop table if exists testresults;
create table testresults (testname text, seconds numeric, tblsize bigint);

drop table if exists tmp;
create temporary table tmp (b1 bytea, b2 bytea, b3 bytea, b4 bytea, b5 bytea, b6 bytea, b7 bytea, b8 bytea, b9 bytea, b10 bytea);

do $$
declare
  iterations int4 := 20;
  i int4;
  iter int4;
  testname text;
  data bytea;
  nrows int4;
  begintime numeric;
  endtime numeric;
begin
  for testname, data, nrows in select * from tests where enabled loop
    raise notice 'running % iterations of test ''%''', iterations, testname;
    for iter in 1..iterations loop
      truncate tmp;
      checkpoint;
      begintime := extract(epoch from clock_timestamp());
      for i in 1..nrows by 500 loop
        insert into tmp select data, data, data, data, data,  data, data, data, data, data from generate_series(1, 500);
      end loop;
      endtime := extract(epoch from clock_timestamp());
      insert into testresults values (testname, endtime - begintime, pg_total_relation_size('tmp'));
    end loop;
  end loop;
end;
$$;

select * from testresults;