I'll take a look tonight. -eric
On Sun, Feb 24, 2019, 21:54 Raymond Hettinger <raymond.hettin...@gmail.com> wrote: > I'll been running benchmarks that have been stable for a while. But > between today and yesterday, there has been an almost across the board > performance regression. > > It's possible that this is a measurement error or something unique to my > system (my Mac installed the 10.14.3 release today), so I'm hoping other > folks can run checks as well. > > > Raymond > > > -- Yesterday > ------------------------------------------------------------------------ > > $ ./python.exe Tools/scripts/var_access_benchmark.py > Variable and attribute read access: > 4.0 ns read_local > 4.5 ns read_nonlocal > 13.1 ns read_global > 17.4 ns read_builtin > 17.4 ns read_classvar_from_class > 15.8 ns read_classvar_from_instance > 24.6 ns read_instancevar > 19.7 ns read_instancevar_slots > 18.5 ns read_namedtuple > 26.3 ns read_boundmethod > > Variable and attribute write access: > 4.6 ns write_local > 4.8 ns write_nonlocal > 17.5 ns write_global > 39.1 ns write_classvar > 34.4 ns write_instancevar > 25.3 ns write_instancevar_slots > > Data structure read access: > 17.5 ns read_list > 18.4 ns read_deque > 19.2 ns read_dict > > Data structure write access: > 19.0 ns write_list > 22.0 ns write_deque > 24.4 ns write_dict > > Stack (or queue) operations: > 55.5 ns list_append_pop > 46.3 ns deque_append_pop > 46.7 ns deque_append_popleft > > Timing loop overhead: > 0.3 ns loop_overhead > > > -- Today > --------------------------------------------------------------------------- > > $ ./python.exe py Tools/scripts/var_access_benchmark.py > > Variable and attribute read access: > 5.0 ns read_local > 5.3 ns read_nonlocal > 14.7 ns read_global > 18.6 ns read_builtin > 19.9 ns read_classvar_from_class > 17.7 ns read_classvar_from_instance > 26.1 ns read_instancevar > 21.0 ns read_instancevar_slots > 21.7 ns read_namedtuple > 27.8 ns read_boundmethod > > Variable and attribute write access: > 6.1 ns write_local > 7.3 ns write_nonlocal > 18.9 ns write_global > 40.7 ns write_classvar > 36.2 ns write_instancevar > 26.1 ns write_instancevar_slots > > Data structure read access: > 19.1 ns read_list > 19.6 ns read_deque > 20.6 ns read_dict > > Data structure write access: > 22.8 ns write_list > 23.5 ns write_deque > 27.8 ns write_dict > > Stack (or queue) operations: > 54.8 ns list_append_pop > 49.5 ns deque_append_pop > 49.4 ns deque_append_popleft > > Timing loop overhead: > 0.3 ns loop_overhead > > > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > https://mail.python.org/mailman/options/python-dev/ericsnowcurrently%40gmail.com >
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