2021-04-14 16:25:22 +03:00
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# Show relative speeds of local, nonlocal, global, and built-in access.
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class _A(object):
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def m(self):
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pass
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v_global = 1
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def read_local():
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v_local = 1
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v_local; v_local; v_local; v_local; v_local
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v_local; v_local; v_local; v_local; v_local
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v_local; v_local; v_local; v_local; v_local
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v_local; v_local; v_local; v_local; v_local
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v_local; v_local; v_local; v_local; v_local
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def make_nonlocal_reader():
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v_nonlocal = 1
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def inner():
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v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
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v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
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v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
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v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
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v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
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return inner
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read_nonlocal = make_nonlocal_reader()
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def read_global():
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v_global; v_global; v_global; v_global; v_global
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v_global; v_global; v_global; v_global; v_global
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v_global; v_global; v_global; v_global; v_global
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v_global; v_global; v_global; v_global; v_global
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v_global; v_global; v_global; v_global; v_global
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def read_builtin():
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oct; oct; oct; oct; oct
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oct; oct; oct; oct; oct
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oct; oct; oct; oct; oct
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oct; oct; oct; oct; oct
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oct; oct; oct; oct; oct
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def read_classvar():
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A = _A
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A.x = 1
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A.x; A.x; A.x; A.x; A.x
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A.x; A.x; A.x; A.x; A.x
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A.x; A.x; A.x; A.x; A.x
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A.x; A.x; A.x; A.x; A.x
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A.x; A.x; A.x; A.x; A.x
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def read_instancevar():
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a = _A()
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a.x = 1
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a.x; a.x; a.x; a.x; a.x
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a.x; a.x; a.x; a.x; a.x
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a.x; a.x; a.x; a.x; a.x
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a.x; a.x; a.x; a.x; a.x
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a.x; a.x; a.x; a.x; a.x
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def read_unboundmethod():
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A = _A
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A.m; A.m; A.m; A.m; A.m
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A.m; A.m; A.m; A.m; A.m
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A.m; A.m; A.m; A.m; A.m
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A.m; A.m; A.m; A.m; A.m
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A.m; A.m; A.m; A.m; A.m
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def read_boundmethod():
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a = _A()
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a.m; a.m; a.m; a.m; a.m
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a.m; a.m; a.m; a.m; a.m
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a.m; a.m; a.m; a.m; a.m
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a.m; a.m; a.m; a.m; a.m
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a.m; a.m; a.m; a.m; a.m
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def write_local():
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v_local = 1
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v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
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v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
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v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
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v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
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v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
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def make_nonlocal_writer():
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v_nonlocal = 1
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def inner():
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nonlocal v_nonlocal
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v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
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v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
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v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
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v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
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v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
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return inner
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write_nonlocal = make_nonlocal_writer()
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def write_global():
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global v_global
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v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
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v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
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v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
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v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
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v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
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def write_classvar():
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A = _A
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A.x = 1; A.x = 1; A.x = 1; A.x = 1; A.x = 1
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A.x = 1; A.x = 1; A.x = 1; A.x = 1; A.x = 1
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A.x = 1; A.x = 1; A.x = 1; A.x = 1; A.x = 1
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A.x = 1; A.x = 1; A.x = 1; A.x = 1; A.x = 1
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A.x = 1; A.x = 1; A.x = 1; A.x = 1; A.x = 1
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def write_instancevar():
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a = _A()
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a.x = 1; a.x = 1; a.x = 1; a.x = 1; a.x = 1
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a.x = 1; a.x = 1; a.x = 1; a.x = 1; a.x = 1
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a.x = 1; a.x = 1; a.x = 1; a.x = 1; a.x = 1
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a.x = 1; a.x = 1; a.x = 1; a.x = 1; a.x = 1
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a.x = 1; a.x = 1; a.x = 1; a.x = 1; a.x = 1
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if __name__=='__main__':
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2021-04-16 13:58:05 +03:00
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from fasttimer import timeit
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2021-04-14 16:25:22 +03:00
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for f in [read_local, read_nonlocal, read_global, read_builtin,
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read_classvar, read_instancevar, read_unboundmethod, read_boundmethod,
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write_local, write_nonlocal, write_global,
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write_classvar, write_instancevar]:
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2021-04-16 13:58:05 +03:00
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print(timeit(f,number=1000000), f.__qualname__ if hasattr(f,'__qualname__') else f.__name__ if hasattr(f,'__name__') else '?')
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2021-04-14 16:25:22 +03:00
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