Re: [PATCHES] Avg performance for int8/numeric - Mailing list pgsql-hackers

Mark Kirkwood wrote:

>>
>
> I've profiled the 2nd patch using the setup indicated below. The first
> 64 lines of the flat graph are attached.

By way of comparison, here is the first 63 lines for:

select sum(val2) from avgtest


Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total
 time   seconds   seconds    calls   s/call   s/call  name
 10.65      0.80     0.80 50002910     0.00     0.00  AllocSetAlloc
  8.66      1.45     0.65 10000000     0.00     0.00  slot_deform_tuple
  7.86      2.04     0.59 40001617     0.00     0.00  AllocSetFree
  7.46      2.60     0.56  9999999     0.00     0.00  add_abs
  6.13      3.06     0.46  9999999     0.00     0.00  numeric_add
  4.93      3.43     0.37  9999999     0.00     0.00  make_result
  4.53      3.77     0.34 10000000     0.00     0.00  advance_transition_function
  3.46      4.03     0.26 29999998     0.00     0.00  free_var
  3.46      4.29     0.26 10000003     0.00     0.00  AllocSetReset
  3.46      4.55     0.26 10000000     0.00     0.00  advance_aggregates
  3.33      4.80     0.25 50002592     0.00     0.00  MemoryContextAlloc
  3.20      5.04     0.24 10000001     0.00     0.00  heapgettup_pagemode
  3.06      5.27     0.23 19999999     0.00     0.00  set_var_from_num
  2.26      5.44     0.17 10000001     0.00     0.00  slot_getattr
  2.13      5.60     0.16 40001616     0.00     0.00  pfree
  2.13      5.76     0.16 10000003     0.00     0.00  ExecProcNode
  2.13      5.92     0.16 10000001     0.00     0.00  ExecScan
  1.73      6.05     0.13 10000103     0.00     0.00  heap_getnext
  1.60      6.17     0.12 10000001     0.00     0.00  SeqNext
  1.60      6.29     0.12 10000000     0.00     0.00  XidInSnapshot
  1.60      6.41     0.12  9999999     0.00     0.00  add_var
  1.46      6.52     0.11 19999999     0.00     0.00  alloc_var
  1.46      6.63     0.11 10000001     0.00     0.00  datumGetSize
  1.33      6.73     0.10 10000001     0.00     0.00  datumCopy
  1.20      6.82     0.09    87860     0.00     0.00  heapgetpage
  1.20      6.91     0.09        2     0.04     3.03  ExecAgg
  0.93      6.98     0.07 10000000     0.00     0.00  ExecEvalVar
  0.93      7.05     0.07 10000000     0.00     0.00  HeapTupleSatisfiesSnapshot
  0.80      7.11     0.06 20000000     0.00     0.00  pg_detoast_datum
  0.80      7.17     0.06   511486     0.00     0.00  LWLockRelease
  0.80      7.23     0.06   511485     0.00     0.00  LWLockAcquire
  0.67      7.28     0.05 10000001     0.00     0.00  ExecStoreTuple
  0.40      7.31     0.03 10000009     0.00     0.00  TransactionIdPrecedes
  0.40      7.34     0.03 10000001     0.00     0.00  MemoryContextReset
  0.40      7.37     0.03    87761     0.00     0.00  StrategyGetBuffer
  0.27      7.39     0.02 10000001     0.00     0.00  ExecSeqScan
  0.27      7.41     0.02  9999999     0.00     0.00  strip_var
  0.27      7.43     0.02   254355     0.00     0.00  hash_search_with_hash_value
  0.13      7.44     0.01   176862     0.00     0.00  LockBuffer
  0.13      7.45     0.01   175902     0.00     0.00  ResourceOwnerForgetBuffer
  0.13      7.46     0.01   175901     0.00     0.00  UnpinBuffer
  0.13      7.47     0.01   164908     0.00     0.00  hash_any
  0.13      7.48     0.01    88213     0.00     0.00  BufTableLookup
  0.13      7.49     0.01    88015     0.00     0.00  ReleaseBuffer
  0.13      7.50     0.01    87761     0.00     0.00  TerminateBufferIO
  0.13      7.51     0.01                             __divdi3
  0.00      7.51     0.00   175903     0.00     0.00  ResourceOwnerEnlargeBuffers
  0.00      7.51     0.00   175902     0.00     0.00  ResourceOwnerRememberBuffer
  0.00      7.51     0.00   164857     0.00     0.00  tag_hash
  0.00      7.51     0.00   163576     0.00     0.00  get_hash_value
  0.00      7.51     0.00   163174     0.00     0.00  BufTableHashCode
  0.00      7.51     0.00    88214     0.00     0.00  ReleaseAndReadBuffer
  0.00      7.51     0.00    88213     0.00     0.00  ReadBuffer
  0.00      7.51     0.00    87802     0.00     0.00  FileSeek
  0.00      7.51     0.00    87802     0.00     0.00  mdopen
  0.00      7.51     0.00    87761     0.00     0.00  BufTableInsert
  0.00      7.51     0.00    87761     0.00     0.00  FileAccess
  0.00      7.51     0.00    87761     0.00     0.00  FileRead