fromabcimportABCMeta#from _py_abc import ABCMetaimporttimeimportpsutilimportosclassRoot(metaclass=ABCMeta):passclassClass1(Root):passclassClass2(Root):passclassClass3(Root):passclassClass4(Root):subclasses= []@classmethoddef__subclasses__(cls):returncls.subclassesdef_create_subclass1():classNestedClass1(Class1):passreturnNestedClass1def_create_subclass2():classNestedClass2(Class2):passreturnNestedClass2def_create_subclass3():classNestedClass3:passClass3.register(NestedClass3)returnNestedClass3def_create_subclass4():classNestedClass4:passClass4.subclasses.append(NestedClass4)returnNestedClass4deftest_performance():iters=2000print("Creating new classes to check")objects_subclass1= []foriinrange(iters):subclass1=_create_subclass1()objects_subclass1.append(subclass1())objects_subclass2= []foriinrange(iters):subclass2=_create_subclass2()objects_subclass2.append(subclass2())objects_subclass3= []foriinrange(iters):subclass3=_create_subclass3()objects_subclass3.append(subclass3())objects_subclass4= []foriinrange(iters):subclass4=_create_subclass4()objects_subclass4.append(subclass4())# create one more subclass for sibling checkanother_subclass1=_create_subclass1()another_subclass2=_create_subclass2()another_subclass3=_create_subclass3()another_subclass4=_create_subclass4()print("Created subclasses =",len(objects_subclass1)+len(objects_subclass2)+len(objects_subclass3)+len(objects_subclass4))print("Consumed memory, Mb:",psutil.Process(os.getpid()).memory_info().rss/1024**2)print("Started compairing objects")# New subclass against parent, sibling, grantparent and cousinnew_subclass1_vs_class1_ns=0new_subclass1_vs_another_subclass1_ns=0new_subclass1_vs_root_ns=0new_subclass1_vs_class2_ns=0forobj1inobjects_subclass1:start=time.perf_counter_ns()assertisinstance(obj1,Class1)new_subclass1_vs_class1_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj1,another_subclass1)new_subclass1_vs_another_subclass1_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertisinstance(obj1,Root)new_subclass1_vs_root_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj1,Class2)new_subclass1_vs_class2_ns+=time.perf_counter_ns()-start# Same subclass against parent, sibling, grantparent and cousincached_subclass1_vs_root_ns=0cached_subclass1_vs_another_subclass1_ns=0cached_subclass1_vs_class1_ns=0cached_subclass1_vs_class2_ns=0for_inrange(iters):start=time.perf_counter_ns()assertisinstance(obj1,Class1)cached_subclass1_vs_class1_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj1,another_subclass1)cached_subclass1_vs_another_subclass1_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertisinstance(obj1,Root)cached_subclass1_vs_root_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj1,Class2)cached_subclass1_vs_class2_ns+=time.perf_counter_ns()-start# new class (via .register) against parent, sibling, grantparent and cousinnew_subclass3_vs_class3_ns=0new_subclass3_vs_another_subclass3_ns=0new_subclass3_vs_root_ns=0new_subclass3_vs_class1_ns=0forobj3inobjects_subclass3:start=time.perf_counter_ns()assertisinstance(obj3,Class3)new_subclass3_vs_class3_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj3,another_subclass3)new_subclass3_vs_another_subclass3_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertisinstance(obj3,Root)new_subclass3_vs_root_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj3,Class1)new_subclass3_vs_class1_ns+=time.perf_counter_ns()-start# same class (via .register) against parent, sibling, grantparent and cousincached_subclass3_vs_class3_ns=0cached_subclass3_vs_another_subclass3_ns=0cached_subclass3_vs_root_ns=0cached_subclass3_vs_class1_ns=0for_inrange(iters):start=time.perf_counter_ns()assertisinstance(obj3,Class3)cached_subclass3_vs_class3_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj3,another_subclass3)cached_subclass3_vs_another_subclass3_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertisinstance(obj3,Root)cached_subclass3_vs_root_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj3,Class1)cached_subclass3_vs_class1_ns+=time.perf_counter_ns()-start# new class (via __subclasses__) against parent, sibling, grantparent and cousinnew_subclass4_vs_class4_ns=0new_subclass4_vs_another_subclass4_ns=0new_subclass4_vs_root_ns=0new_subclass4_vs_class1_ns=0forobj4inobjects_subclass4:start=time.perf_counter_ns()assertisinstance(obj4,Class4)new_subclass4_vs_class4_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj4,another_subclass4)new_subclass4_vs_another_subclass4_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertisinstance(obj4,Root)new_subclass4_vs_root_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj4,Class1)new_subclass4_vs_class1_ns+=time.perf_counter_ns()-start# same class (via __subclasses__) against parent, sibling, grantparent and cousincached_subclass4_vs_class4_ns=0cached_subclass4_vs_another_subclass4_ns=0cached_subclass4_vs_root_ns=0cached_subclass4_vs_class1_ns=0for_inrange(iters):start=time.perf_counter_ns()assertisinstance(obj4,Class4)cached_subclass4_vs_class4_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj4,another_subclass4)cached_subclass4_vs_another_subclass4_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertisinstance(obj4,Root)cached_subclass4_vs_root_ns+=time.perf_counter_ns()-startstart=time.perf_counter_ns()assertnotisinstance(obj4,Class1)cached_subclass4_vs_class1_ns+=time.perf_counter_ns()-startprint("Completed compairing classes.")print("Consumed memory, Mb:",psutil.Process(os.getpid()).memory_info().rss/1024**2)total_ns=sum([cached_subclass1_vs_root_ns,cached_subclass1_vs_another_subclass1_ns,cached_subclass1_vs_class1_ns,cached_subclass1_vs_class2_ns,cached_subclass3_vs_class3_ns,cached_subclass3_vs_another_subclass3_ns,cached_subclass3_vs_root_ns,cached_subclass3_vs_class1_ns,cached_subclass4_vs_class4_ns,cached_subclass4_vs_another_subclass4_ns,cached_subclass4_vs_root_ns,cached_subclass4_vs_class1_ns,new_subclass1_vs_class1_ns,new_subclass1_vs_another_subclass1_ns,new_subclass1_vs_root_ns,new_subclass1_vs_class2_ns,new_subclass3_vs_class3_ns,new_subclass3_vs_another_subclass3_ns,new_subclass3_vs_root_ns,new_subclass3_vs_class1_ns,new_subclass4_vs_class4_ns,new_subclass4_vs_another_subclass4_ns,new_subclass4_vs_root_ns,new_subclass4_vs_class1_ns,    ])print("Total, sec:",total_ns/10**9)print("isinstance(cached class, parent), us:",cached_subclass1_vs_root_ns/iters/1000)print("isinstance(cached class, sibling), us:",cached_subclass1_vs_another_subclass1_ns/iters/1000)print("isinstance(cached class, grandparent), us:",cached_subclass1_vs_class1_ns/iters/1000)print("isinstance(cached class, cousin), us:",cached_subclass1_vs_class2_ns/iters/1000)print("isinstance(cached class, parent via .register()), us:",cached_subclass3_vs_class3_ns/iters/1000)print("isinstance(cached class, sibling via .register()), us:",cached_subclass3_vs_another_subclass3_ns/iters/1000)print("isinstance(cached class, grandparent via .register()), us:",cached_subclass3_vs_root_ns/iters/1000)print("isinstance(cached class, cousin via .register()), us:",cached_subclass3_vs_class1_ns/iters/1000)print("isinstance(cached class, parent via __subclasses__), us:",cached_subclass4_vs_class4_ns/iters/1000)print("isinstance(cached class, sibling via __subclasses__), us:",cached_subclass4_vs_another_subclass4_ns/iters/1000)print("isinstance(cached class, grandparent via __subclasses__), us:",cached_subclass4_vs_root_ns/iters/1000)print("isinstance(cached class, cousin via __subclasses__), us:",cached_subclass4_vs_class1_ns/iters/1000)print("isinstance(new class, parent), us:",new_subclass1_vs_class1_ns/len(objects_subclass1)/1000)print("isinstance(new class, sibling), us:",new_subclass1_vs_another_subclass1_ns/len(objects_subclass1)/1000)print("isinstance(new class, grandparent), us:",new_subclass1_vs_root_ns/len(objects_subclass1)/1000)print("isinstance(new class, cousin), us:",new_subclass1_vs_class2_ns/len(objects_subclass1)/1000)print("isinstance(new class, parent via .register()), us:",new_subclass3_vs_class3_ns/len(objects_subclass3)/1000)print("isinstance(new class, sibling via .register()), us:",new_subclass3_vs_another_subclass3_ns/len(objects_subclass3)/1000)print("isinstance(new class, grandparent via .register()), us:",new_subclass3_vs_root_ns/len(objects_subclass3)/1000)print("isinstance(new class, cousin via .register()), us:",new_subclass3_vs_class1_ns/len(objects_subclass3)/1000)print("isinstance(new class, parent via __subclasses__), us:",new_subclass4_vs_class4_ns/len(objects_subclass4)/1000)print("isinstance(new class, sibling via __subclasses__), us:",new_subclass4_vs_another_subclass4_ns/len(objects_subclass4)/1000)print("isinstance(new class, grandparent via __subclasses__), us:",new_subclass4_vs_root_ns/len(objects_subclass4)/1000)print("isinstance(new class, cousin via __subclasses__), us:",new_subclass4_vs_class1_ns/len(objects_subclass4)/1000)if__name__=="__main__":test_performance()