QUERY PLAN                                             
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 HashAggregate  (cost=9058.48..17448.32 rows=108256 width=66)
   Group By: id
   Rows out:  100000 rows with 460 ms to first row, 1014 ms to end, start offset by 0.120 ms.
   Executor memory:  110093K bytes.
   ->  Seq Scan on test_group  (cost=0.00..1480.56 rows=108256 width=66)
         Rows out:  100000 rows with 0.019 ms to first row, 52 ms to end, start offset by 0.554 ms.
 Slice statistics:
   (slice0)    Executor memory: 110271K bytes.
 Settings:  enable_groupagg=off; enable_hashagg=on; enable_seqscan=off; work_mem=320000kB
 Total runtime: 1038.209 ms
 
(10 rows)